What Is Yaws? Understanding This Tropical Skin Infection and How It Is Treated

Have you ever heard of a skin condition called yaws? This name might sound completely new to you, but it is a serious bacterial infection that can affect your skin and even your bones if you do not treat it right away.

Yaws most commonly affects children living in warm, tropical regions around the world. Fortunately, doctors can cure this condition easily with the right medicine when they catch it early.

Let us walk through everything you need to know about yaws in clear, simple terms. You will learn about its stages, common symptoms, how it spreads, and what you can do to stay safe.

What Is Yaws?

Yaws is a chronic bacterial infection that mainly targets your skin and bones. The germ responsible for yaws is a microscopic spiral bacterium known as Treponema pallidum pertenue.

The infection usually starts as a small bump right on your skin where the bacteria entered your body. Over time, this bump can grow larger and spread to other parts of your body if you do not get treatment.

If you leave yaws untreated for many months or years, it can cause severe damage to your skin, cartilage, and bones. Doctors group yaws under a category of infections called endemic treponematoses, and people in various regions also call it pian, framboesia, or bouba.

Stages of Yaws.

Yaws develops in four distinct stages over time. Knowing these stages helps you understand how the infection progresses through your body.

Primary Yaws.

This is the very first stage where you notice symptoms appear on your body. A small bump forms on your skin, grows larger over weeks, and often develops a crust on top.

This initial skin sore can last anywhere from three to six months before it eventually heals on its own. However, healing on the outside does not mean the bacteria have left your body.

Secondary Yaws.

The secondary stage begins a few months after your first skin bump appears. During this stage, multiple new bumps and sores break out across different areas of your skin.

The infection can also begin to spread into your bones and deeper tissues during this active phase. You may feel very tired and experience general body aches.

Latent Yaws.

In the latent stage, lab tests will show that you carry the yaws bacteria in your body, but you show no visible symptoms at all.

This hidden stage can last for many years without any warning signs. Even though you look and feel healthy, the bacteria remain inside your body.

Tertiary Yaws.

If you do not get treatment during the earlier stages, about ten percent of people will develop tertiary or late yaws five to ten years later.

During this severe stage, destructive bumps and deep open sores can form all over your body. These late complications can permanently damage your bones and joints.

Difference Between Yaws and Syphilis.

You might have heard of a sexually transmitted infection called syphilis before. The bacteria that cause yaws look almost identical under a microscope to the bacteria that cause syphilis.

However, the most important difference is that yaws is not a sexually transmitted infection. Yaws spreads simply through routine skin-to-skin contact in everyday environments.

Symptoms of Yaws.

The main symptoms of yaws include recurring skin bumps, open sores, and lesions that change over time. You may also notice several other physical signs:

• Swollen lymph nodes in your neck, armpits, or groin.
• Pain and swelling in your bones and joints.
• Persistent fatigue and low energy.
• A general feeling of being unwell or sick.

Primary Stage Symptoms.

The first symptom is a single skin bump that forms where the bacteria entered your body. Doctors sometimes call this primary sore the mother yaw.

While this bump can appear anywhere, it most often shows up on your legs or feet. It starts as a small pimple, turns into an itchy ulcer, fills with fluid, and develops a crust.

Secondary Stage Symptoms.

Secondary symptoms begin one to two months after the first bump heals, though it can sometimes take up to two years. Widespread bumps appear across your hands, feet, and limbs.

These secondary skin lesions can take many different appearances:

• Wart-like growths on your skin surface.
• Open ulcers or weeping wounds.
• Raised, rough bumps that resemble a raspberry.
• Reddish-yellow patches.
• Flat, scaly skin areas.
• Thickened and hardened skin zones.

During this stage, yaws can spread directly into your bones. This causes painful swelling in your fingers, hands, arms, and legs.

Tertiary Stage Symptoms.

Without treatment, late yaws brings severe complications years later. You might develop large destructive lumps near your joints.

Deep open wounds can eat away at your skin, cartilage, and bone structures. You may also notice thick, hard plaques forming on the palms of your hands and the soles of your feet.

Causes of Yaws.

Yaws happens because of a specific bacterium called Treponema pallidum pertenue. During the primary and secondary stages, millions of these bacteria live inside your skin sores.

When you touch the open sores of someone who has active yaws, the bacteria can transfer directly onto your skin.

Is Yaws Contagious?

Yes, yaws is a contagious infection. It passes easily from person to person through direct skin-to-skin contact.

For example, if children play together closely and one child has an open yaws sore, the bacteria can enter another child through a tiny scratch or cut. Yaws spreads actively during the first and second stages, but tertiary yaws does not spread to others.

Who Gets Yaws Most Often?

In regions where yaws is common, children under fifteen years old get infected most often. Their active outdoor play makes skin contact and minor cuts very common.

Adults can also catch yaws if they have no prior immunity. However, adults living in endemic areas often develop some natural immunity over many years of exposure.

Where Is Yaws Most Common?

Yaws occurs most often in warm, humid, tropical climates around the world. Typical regions include:

• Specific tropical countries in Southeast Asia.
• Rural communities in West and Central Africa.
• Remote islands across the Pacific region.

The disease thrives primarily in poor, rural areas where access to clean water and health clinics is limited.

Complications of Yaws.

If you leave yaws untreated, it can cause severe long-term health problems and physical disabilities:

• Severe swelling in your fingers and toes, known as dactylitis.
• Infections in your bones or bone linings, called periostitis.
• Tissue death, known medically as necrosis.
• Permanent physical disfigurement of your face and limbs.
• Destruction of your nose bones and cartilage, called gangosa.
• Secondary bacterial infections invading your open skin ulcers.
• Difficulty walking due to painful, thick plaques on the soles of your feet.

These complications are serious and can change your life forever. That is why seeing a doctor right away when you notice strange skin sores is so important.

How Doctors Diagnose Yaws.

Your doctor diagnoses yaws by carefully examining your skin and reviewing your recent travel history and health background.

They may take a small sample from your skin sore or draw a blood sample to test for the bacteria. Under a microscope, yaws bacteria look identical to syphilis bacteria, so your doctor relies heavily on your specific symptoms and medical history to confirm the diagnosis.

Can Yaws Be Cured?

Yes, the wonderful news is that doctors can cure yaws completely! Simple antibiotic treatments can wipe out the infection quickly.

In most cases, a single high dose of azithromycin pills or a benzathine penicillin injection cures the disease entirely. Doctors can treat yaws during any stage, but getting care during the early primary stage stops painful complications before they start.

What Happens If You Get Yaws? Outlook and Recovery.

Yaws is an easily curable condition when you catch it early and follow your doctor's instructions.

If you take your medicine promptly, your skin heals cleanly. However, if you let the infection progress without treatment, you risk permanent scars and irreversible bone damage.

How to Protect Yourself From Yaws.

Protecting yourself from yaws means avoiding close skin contact with anyone who has active yaws sores. Remember that people with late-stage tertiary yaws do not spread the infection.

Public health organizations like the World Health Organization run large campaigns to treat entire communities in endemic regions, stopping the spread of yaws for everyone.

When to See a Doctor.

You should schedule an appointment with your doctor right away if you notice any of these situations:

• You live in or recently visited an area where yaws is common, and you develop skin sores.
• Someone in your household or a close contact receives a yaws diagnosis.
• You have a skin wound that refuses to heal or keeps returning.

Getting medical care early stops the infection in its tracks and prevents permanent damage.

Questions to Ask Your Doctor.

When you visit your doctor for a skin evaluation, asking these helpful questions will guide your care:

• What stage of yaws do I currently have?
• Will my skin heal completely without permanent scars?
• How should I care for my skin at home while it heals?
• Do my family members or close contacts need to take antibiotics too?
• How long will I remain contagious to other people?

Sources and References: World Health Organization (WHO) - Yaws Fact Sheet; Centers for Disease Control and Prevention (CDC) - Tropical Diseases; National Health Service (NHS) - Skin Infections Overview; Mayo Clinic - Bacterial Skin Conditions; National Institutes of Health (NIH) - PubMed Central Clinical Review on Treponemal Infections.

Tags: yaws, framboesia, pian, treponema pallidum pertenue, skin infection, tropical disease, child health