It is hard to find someone who doesn't get a cold at least once or twice a year, isn't it? A stuffy nose, a scratchy throat, and constant sneezing—these annoying symptoms can disrupt your entire day. Whether at home, school, or the office, this highly contagious condition—the ‘common cold’ (Common Cold)—is what we are talking about today. How does it actually start? What are the symptoms? Is there a cure, and can it be prevented? Let’s find the answers to all these questions in this article from Nirogi Lanka.
🤔 What exactly is the common cold? (Overview)
Simply put, a common cold is an infection of your upper respiratory system, caused by a virus affecting your nose, throat, sinuses, and windpipe (trachea).
❓ How do you catch a cold?
This infection is triggered by a virus. The virus enters your body through the mucous membranes—the moist, delicate linings—in your nose, eyes, or mouth. How does this happen?
- Through inhalation: When someone with a cold coughs or sneezes, tiny virus-containing droplets are released into the air. If you breathe in that air, the virus can enter your nose.
- Through touch: If an infected person wipes their nose or covers a sneeze and then touches a doorknob, table, or phone, the virus can live on those surfaces. If you touch that surface and then touch your own nose, mouth, or eyes, the virus can enter your body.
❓ Why is it called the “Common Cold”?
As the name suggests, it is very 'common.' In fact, it is likely the most frequent illness you will experience in your lifetime! On average, an adult catches one two to three times a year, while children may catch it four or more times annually.
❓ Is the common cold a coronavirus?
This is a bit confusing. There are over 200 types of viruses that can cause a cold! Most commonly (about 50%), the cold is caused by a group called Rhinoviruses. However, some strains of the Coronavirus family can also cause common colds. These are not the same as the novel coronavirus (SARS-CoV-2) that caused the COVID-19 pandemic in 2019. The coronaviruses that cause common colds are not severe and resolve quickly. (We will discuss the difference between COVID-19 and the common cold later.)
🤧 Symptoms and Causes
Symptoms of a cold usually don't appear all at once; they progress in stages.
❓ What are the symptoms of a cold?
- Early Stage (Days 1-3): Within one to three days of the virus entering your body, you will start to notice the first signs. About 50% of people first feel a tickle, scratchiness, or soreness in their throat (sore throat). Other early symptoms include:
- Sneezing
- Runny nose (watery at first, potentially becoming thicker)
- Stuffy nose (nasal congestion)
- Cough (often dry initially)
- Hoarseness
- Active Stage (Days 4-7): This is when your symptoms may peak. In addition to the previous signs, you may also experience:
- Body aches and fatigue
- Headache
- Watery eyes or persistent runny nose
- Exhaustion
- Fever (more common in children than adults)
- Late Stage (Days 8-10): Most of the time, the illness begins to wane by now. You may feel fully recovered. However, some symptoms, especially a 'nagging cough,' can persist for weeks (sometimes up to 2 months). Important: If you don't feel better after 10 days, or if your symptoms worsen or the fever returns, please consult a doctor. You may have developed a complication like Bronchitis, Sinusitis, or Pneumonia.
❓ Symptoms in Babies
Babies may show symptoms differently than adults:
- Runny nose (starting watery, then turning yellow, green, or grey)
- Sneezing
- Fever of 101-102°F (38.3-38.9°C)
- Loss of appetite
- Increased drooling due to a sore throat and difficulty swallowing
- Cough
- Irritability
- Slightly swollen lymph nodes in the neck
❓ When is a child's cold serious?
If your child exhibits any of the following, it may be more than a common cold. Seek immediate medical attention if:
- Your baby is 2 months old or younger and has a fever.
- They have difficulty breathing (flaring nostrils).
- Fast or labored breathing.
- Wheezing while breathing.
- Rib retractions (ribs pulling inward while breathing).
- Blue-tinged lips.
- Refusal to eat or drink (risk of dehydration).
- Signs of ear pain.
- Extreme lethargy or unusual irritability.
- A cough lasting longer than 3 weeks.
- Symptoms appear to be worsening daily instead of improving.
❓ What causes the common cold?
As mentioned, colds are caused by viruses, with Rhinoviruses being the primary culprit. There are over 100 types of Rhinoviruses alone! Combined with the other 200+ viruses, including common cold-causing coronaviruses, it is possible to catch a cold repeatedly because each time, it may be a different virus.
❓ Is the common cold contagious, and how does it spread?
Yes, it is definitely contagious. The cold spreads very easily from one person to another. As mentioned earlier, it typically spreads by breathing in viral droplets released when an infected person coughs or sneezes, or by touching a contaminated surface and then touching your nose, mouth, or eyes.
❓ How long are you contagious?
It might surprise you, but you can spread the virus to others starting a day or two before you even develop symptoms! Furthermore, even after you start feeling better, you may continue to shed the virus for up to two weeks. However, you are most contagious when your symptoms are at their peak—typically within the first 3 days of becoming ill.
❓ What is the incubation period?
The incubation period is the time from when the virus enters your body until your first symptoms appear. For a common cold, this period usually ranges between 12 hours and 3 days.
❓ Why do young children catch colds more often?
Children and babies have an immune system that has not yet been exposed to most common viruses. Their bodies are still learning to recognize and fight these new pathogens, making them highly susceptible to infections. By the age of two, a child might catch a cold 8–10 times a year! As we grow into adulthood, we have been exposed to many more cold viruses, allowing our immune systems to recognize and fight them off quickly. Another reason is that young children are in close contact with others in school or during play. They also often fail to cover their coughs or sneezes, frequently touch their mouths, noses, or eyes, and wash their hands less often. Cold viruses can live on surfaces like toys and books for several hours; if a child touches an infected toy and then puts their hands in their mouth, they can easily get sick.
🩺 Diagnosis and Tests
❓ How does a doctor diagnose a cold?
Typically, a doctor will diagnose a cold by asking about your symptoms and performing a physical examination. During the exam, they may check for:
- Swollen nasal passages.
- Congestion or stuffy nose.
- Red or irritated throat.
- Swollen lymph nodes in the neck.
- Clear breath sounds in the lungs (to rule out conditions like pneumonia).
❓ What tests are performed?
In most cases, a cold can be diagnosed based on symptoms and a physical exam, and no special testing is required. However, if your doctor suspects you have COVID-19, influenza (the flu), or another condition, they may perform a nasal swab test to check for those specific viruses. If they suspect complications like bronchitis or pneumonia, they might order a chest X-ray.
💊 Management and Treatment
❓ How is a cold treated?
This is the most important part: There is no ‘cure’ for the common cold. This means there is no medicine that can completely kill the virus. The goal is to allow your body to heal itself while managing your symptoms and keeping you comfortable. Most colds resolve on their own within 7 to 10 days without serious complications. Treatment involves over-the-counter (OTC) medications to reduce symptoms and supportive home care.
❓ Why can’t antibiotics cure a cold?
This is a common misconception. Antibiotics are medications designed to treat infections caused by bacteria. Colds are caused by viruses. Therefore, antibiotics are ineffective against a cold and will not help you recover faster. Overusing antibiotics only kills the good bacteria in your body and contributes to antibiotic resistance. However, if complications arise—such as a secondary bacterial ear infection or pneumonia—your doctor may prescribe antibiotics specifically for those bacterial infections.
❓ What medications help reduce symptoms?
There are many OTC medications available for cold symptoms. However, some are not suitable for young children. Always consult a doctor or pharmacist before giving any medication to a child. Additionally, avoid combining different medications for individual symptoms; doing so can lead to an overdose of certain ingredients, which may cause health issues (like liver damage). A few common types of remedies include:
- Pain relievers: Acetaminophen (such as Panadol® or Calpol®) and NSAIDs (such as ibuprofen, e.g., Brufen®) can help reduce headaches and fever.
- Decongestants: Products containing pseudoephedrine (such as Sudafed®) help relieve nasal congestion. (These may not be suitable for everyone, especially those with high blood pressure, so consult your doctor). Nasal decongestant sprays are also available, but they should not be used for more than a few days.
- Antihistamines: Medications like chlorpheniramine (e.g., Piriton®) or diphenhydramine (e.g., Benadryl®) can help reduce sneezing and a runny nose, though they may cause drowsiness.
- Cough suppressants: Ingredients like dextromethorphan help control coughs. (These are generally not recommended for children under 5).
- Expectorants: Medications containing guaifenesin (such as Mucinix®) help thin mucus, making it easier to cough up and clear from the chest.
❓ How do you care for a baby with a cold?
Crucial rule: Unless prescribed by a physician, do not give any over-the-counter cough or cold medicine to babies! When a baby has a cold, you should take the following steps:
- Keep your baby comfortable: Ensure your baby is dressed in warm, cozy clothing.
- Stay hydrated: If your baby is under 6 months old, continue exclusive breastfeeding or formula feeding. For babies over 6 months, you may offer small, frequent sips of water.
- Prioritize rest: If your baby seems too tired to play, allow them plenty of time to sleep and recover.
- Managing a stuffy nose: Since infants cannot clear their own noses until around age 4, these methods can help:
- Saline and suction: About 15 minutes before feeding, use a few drops of saline (salt water solution) from your pharmacy in each nostril to loosen thick mucus. Then, gently use a rubber bulb syringe or an oral suction device to clear the mucus. This will make breathing much easier for your baby.
- Petroleum jelly: Apply a small amount of petroleum jelly to the outer skin around the nostrils. Frequent wiping can make this area red and dry. Do not apply it inside the nostrils. (Avoid over-the-counter nasal sprays unless specifically recommended by your doctor, as they can sometimes make congestion worse).
- Humidifier or vaporizer: Use a cool-mist humidifier in your baby's room to add moisture to the air, which helps soothe a dry nose and throat. Always clean and dry the device thoroughly before use to prevent the growth of bacteria or mold, and check if the filter needs replacing. Do not use hot-steam vaporizers, as they carry a high risk of accidental burns.
- Steam therapy: If you don't have a humidifier, you can run a hot shower, close the bathroom door, and sit in the steamy room with your baby for about 15 minutes. (Never leave your baby unattended). A warm bath can also be very soothing.
If your baby is acting normally, let them play and continue their usual routine. However, if they have a fever or other complications, it is best to keep them at home.
🛡️ How to Prevent Colds
While you cannot prevent every cold, there are many effective ways to lower the risk for you and your family:
❓ Steps you can take to prevent colds
- Wash hands frequently: Use soap and water to scrub your hands for at least 20 seconds. This is essential before eating or preparing food, after using the restroom, after wiping your nose, or after contact with someone who is ill.
- Avoid touching your face: Viruses often enter your body when you touch your eyes, nose, or mouth with unwashed hands.
- Disinfect high-touch areas: Viruses can linger on doorknobs, light switches, phones, and keyboards. Clean these surfaces regularly.
- Use hand sanitizer: When soap and water are not available, use an alcohol-based hand sanitizer (at least 60% alcohol).
- Boost your immunity: Get adequate sleep, eat a balanced diet rich in fruits and vegetables, and stay active. This prepares your body to fight off infections.
- Stay home when sick: If you have a cold, stay home to rest and prevent spreading the virus to others.
❓ Protecting your baby from colds
- Limit exposure: The best protection is to keep your baby away from people who are coughing or sneezing. A minor cold for an adult can be significantly more dangerous for a baby.
- Strict hand hygiene: Anyone interacting with your baby should wash their hands after coughing, sneezing, or wiping their nose. Always wash your hands after wiping your baby’s nose as well.
- Sanitize toys: Clean your baby’s toys regularly. Do not share toys that babies frequently put in their mouths.
- Sanitizer safety: If soap and water are not handy, use wipes or sanitizer, but always keep sanitizers stored safely out of reach—they are dangerous if ingested.
- Stay updated on vaccines: Ensure your baby receives all scheduled immunizations. While vaccines don't prevent colds, they protect against serious complications like pneumonia or ear infections. An annual flu vaccine is recommended for babies over 6 months, and COVID-19 vaccination is also available starting at age 6 months.
✅ Recovery Timeline
❓ How long do colds last?
In most cases, a cold will clear up on its own within 7 to 10 days, with symptoms gradually fading away.
❓ Can a cold be life-threatening?
For healthy individuals, a cold is not fatal. However, it can lead to serious complications in those with weakened immune systems (e.g., those with HIV, cancer patients, or transplant recipients), those with respiratory conditions like asthma, or the very young and elderly. If complications like sinusitis, ear infections, or pneumonia develop, they can become life-threatening if left untreated.
🏠 Living With a Cold / Self-Care
❓ The best self-care practices
When you have a cold, follow these steps:
- Rest: Allow your body time to heal. Stay home from work or school for a few days to recover and avoid infecting others.
- Stay hydrated: Drink plenty of fluids like water, broth, or low-sugar juices. Staying hydrated keeps your throat and nose moist, making it easier to clear mucus. Avoid alcohol and caffeine, as these can lead to dehydration.
About supplements: You may have heard that Zinc, Vitamin C, or Echinacea can cure a cold. However, there is no strong scientific evidence that these prevent or cure a cold. Some studies suggest Zinc might slightly shorten the duration of symptoms, but it is not definitive. Avoid nasal sprays containing Zinc, as they can cause a permanent loss of smell. Vitamin C does not prevent colds but may slightly reduce the duration of symptoms. A balanced diet remains your best defense.
❓ When to see a doctor (Adults)
Seek medical attention if you experience:
- High fever (above 102°F / 38.9°C)
- Chest pain
- Severe ear pain
- Worsening asthma or difficulty breathing
- Symptoms lasting longer than 10 days or worsening
- A fever that returns after subsiding
❓ When to take your baby to the doctor
If your baby shows the following symptoms, seek immediate medical care or go to the nearest emergency department:
- High fever (especially if your baby is under 3 months old and has a fever over 100.4°F / 38°C)
- Complete refusal to eat or drink
- Persistent vomiting
- Signs of ear or abdominal pain
- Crying excessively more than usual
- Appearing unusually lethargic or difficult to wake
- Wheezing while breathing
- Difficulty breathing or shortness of breath
❓ Additional Common Questions
❓ Can getting a cold during pregnancy affect me?
While catching a common cold during pregnancy is usually not dangerous, you must be very careful regarding the medications you take. Many over-the-counter (OTC) drugs are not recommended during this time. Please consult your Obstetrician/Gynecologist to confirm which medications are safe for you. If you suspect you have the flu or are experiencing a fever, notify your doctor immediately, as you may require prompt medical attention.
❓ Why do colds spread more during cold or rainy seasons?
Although colds can occur year-round, they are more frequent during colder weather (such as winter in the West or the rainy seasons in Sri Lanka). One reason is that during these times, people tend to stay indoors—in homes, offices, or classrooms—where they are in closer proximity to one another, making it easier for viruses to spread. Additionally, some studies suggest that cold air may lower the temperature in the nasal cavity, potentially reducing your immune system's ability to fight off rhinoviruses. While further research is needed to confirm if this applies exactly the same way to humans, colder weather clearly plays a role in increased transmission.
❓ What is the difference between a cold and COVID-19?
Coronaviruses are a large family of viruses. While some cause common colds, the strain discovered in 2019 (SARS-CoV-2) causes COVID-19. Both affect the respiratory system, but COVID-19 can lead to severe conditions like pneumonia. Early COVID-19 symptoms often included fever, chills, shortness of breath, loss of taste or smell, and diarrhea—symptoms rarely seen in a common cold. However, the Omicron variant produces symptoms very similar to a common cold, such as runny nose, cough, sore throat, headache, and nasal congestion, making it hard to distinguish without a test. If you are in doubt, getting a COVID-19 test is the wisest course of action.
❓ What is the difference between a cold and the flu (Influenza)?
It is easy to confuse these two because their symptoms overlap and both tend to circulate during cold/rainy seasons. However, they are caused by different viruses. A common cold is caused by a variety of viruses (including rhinoviruses), while the flu is caused specifically by the influenza virus. The main difference is that the flu typically presents with high fever, chills, body aches, and extreme fatigue. Adults rarely get a fever with a common cold, whereas the flu is almost always accompanied by one. Flu symptoms are generally more severe than a cold and can lead to dangerous complications like pneumonia.
❓ What is the difference between a common cold and a chest cold (Acute Bronchitis)?
A “chest cold” or acute bronchitis is an inflammation of the bronchial tubes that carry air to your lungs, often accompanied by mucus buildup. This usually happens when a cold virus spreads from your nose and throat down into your lungs. While both a cold and a chest cold involve coughing, a chest cold is often characterized by a 'wet cough' that produces mucus. You may also experience chest discomfort, difficulty breathing, and a cough so persistent that it disrupts your sleep.
✍️ Final Thoughts
Though a cold can be a nuisance, it is usually not serious and will resolve on its own in a few days. The best treatment is rest and staying well-hydrated. While you can use pharmacy-bought remedies to manage symptoms, antibiotics will not help, as they do not treat viral infections. Please exercise extra caution when giving medication to children. It is also your responsibility to avoid spreading the virus to others while you are unwell. If your symptoms persist beyond 10 days or become severe, please contact a doctor or visit an emergency facility immediately. Stay healthy with Nirogi Lanka!
