Found a mysterious lump under your skin? Here is what rheumatoid nodules mean for you.

If you live with rheumatoid arthritis, you might notice small bumps or lumps forming under your skin near your elbows or knuckles. Finding a new lump can feel scary, and you might wonder if something serious is wrong. Try not to worry, as these lumps are usually harmless and very common with this condition.

Today, we will talk all about these special bumps known as rheumatoid nodules. We will explain why they happen, how they feel, and what you can do about them so you can feel more confident and informed.

Let us explore everything you need to know about these skin lumps in simple, clear terms.

What Are Rheumatoid Nodules?

Simply put, rheumatoid nodules are small bumps that form under your skin or sometimes inside your body when you have rheumatoid arthritis. In medical terms, a nodule is usually a small growth measuring less than an inch across.

The most important thing to know is that these nodules are benign, meaning they are not cancer. Having these lumps does not mean you have cancer now, and it does not mean you will get cancer in the future. You do not need to worry about that.

These nodules form from a collection of different cells clumped together. This group of cells includes:

• Dead skin cells.
• Fibrin, which is a strong protein that helps your blood clot.
• Inflammatory cells from your immune system.

When these cells gather together in one spot, they form the small bump you can feel under your skin.

Where Do These Lumps Usually Form?

These nodules usually form on parts of your body that you use a lot during daily activities or places that face constant pressure. Let us look at where you can find them most often and where they appear less often.

How Do These Lumps Feel? Do They Hurt?

When you press on these nodules, some of them feel firm and hard under your skin, like a small pebble. Other nodules might feel a bit softer, almost like a small stress ball that you can squeeze slightly.

When it comes to size, they can be as small as a pencil eraser. In very rare cases, they can grow as large as a computer mouse.

The most important thing to remember is that these nodules usually do not hurt. However, if you press hard right on the bump, it might feel a bit tender or sensitive. This tenderness can feel stronger if the nodule forms right next to a joint that is currently inflamed or swollen from your arthritis.

You cannot feel nodules that form inside your body, such as in your lungs, eyes, or vocal cords. Doctors often discover these internal nodules by accident during an X-ray or an eye exam done for another reason.

Why Do Rheumatoid Nodules Form?

The exact reason you get rheumatoid arthritis is also what causes these nodules to form. Your immune system creates an autoimmune response, which means it mistakenly attacks healthy tissue in your body.

However, not everyone with rheumatoid arthritis gets these nodules. Experts estimate that between 25% and 40% of people with rheumatoid arthritis develop them. Nodules inside organs like the lungs or eyes happen in less than 1% of patients.

When you have rheumatoid arthritis, your immune system attacks healthy joints and causes swelling and pain. When your immune system stays overactive like this, it can also affect other tissues in your body.

Imagine you work as a carpenter or type on a computer all day long. You use your hands and fingers constantly. If you have rheumatoid arthritis, you have a higher chance of forming these nodules around those hardworking joints.

People with high levels of rheumatoid factor or CCP antibodies in their blood also have a higher chance of getting these nodules. Your doctor can easily measure these levels with a routine blood test.

What Treatments Help Clear These Nodules?

Sometimes, these nodules need no treatment at all. They can appear on their own and go away on their own. This is very similar to how your rheumatoid arthritis symptoms might flare up on some days and calm down on other days.

How long a nodule stays depends on where it is, how active your arthritis is, and your overall health.

However, if a nodule causes pain, refuses to go away, or bothers you because of how it looks, your doctor can help you find the right treatment.

Common Treatment Options:

• Corticosteroids: These are medicines that lower inflammation. Your doctor might inject a small amount of medicine directly into or near the nodule.
• DMARDs (Disease-modifying antirheumatic drugs): These medicines control your overactive immune system and reduce widespread inflammation in your body.
• NSAIDs: These are non-steroidal anti-inflammatory pain medicines. Your doctor can recommend the best type for you.
• Monoclonal antibodies: These are lab-made proteins that help regulate your immune system. An example is an injection called rituximab.

Do You Need Surgery to Remove These Nodules?

Most of the time, surgery is not necessary. However, your doctor might suggest surgery in specific situations:

• The nodule presses on an internal organ or is located in a dangerous spot and will not go away on its own.
• The nodule grows very large.
• Other medical treatments fail to shrink or remove the lump.
• The nodule makes it hard to move your limbs or perform daily tasks, such as rubbing against shoes or clothes constantly.

When Should You See a Doctor?

If you notice any new change, bump, or lump on or under your skin, you should always schedule a visit with your doctor to get it checked.

If you already take medicine for rheumatoid arthritis and feel like your treatment is no longer working as well as it used to, tell your doctor right away.

Finding a new skin lump can feel surprising and a bit scary. The good news is that rheumatoid nodules are usually harmless and often fade away without treatment. Even if you need treatment, doctors use many of the same medicines you already take for arthritis.