Can Hyaluronic Acid Injections Help Your Thumb Arthritis Pain?

If you have pain at the base of your thumb, you might have a condition called thumb arthritis or rhizarthrosis. This happens when the cartilage in the joint wears away. You know how much it can hurt to grip things or turn a key. Researchers wanted to see if special gel injections could help.

This study looked at whether injections of hyaluronic acid, which is a thick gel that acts like a cushion, could reduce pain and swelling in the thumb joint.

In this article:

• What is thumb arthritis and why does it hurt?
• What did the researchers do in this study?
• What kind of gel was used?
• Did the treatment help with pain?
• What happened to the inflammation?
• Common questions
• What this means for you
• Important information
• Study source

What is thumb arthritis and why does it hurt?

Thumb arthritis happens at a special joint called the trapeziometacarpal joint. That is a big word. We can call it the TMC joint. This joint sits right at the base of your thumb where it meets your wrist.

Osteoarthritis is the medical name for when joints wear out over time. The cartilage, which is like a slippery cushion between bones, gets thin or breaks down. This causes pain, swelling, and makes it hard to use your thumb.

You may be wondering why this matters. Your thumb does more work than you might think. You use it to open jars, button shirts, write, and hold your phone. When it hurts, daily life gets difficult.

What did the researchers do in this study?

According to this study, researchers worked with 16 patients who had painful thumb arthritis. These patients had pain in both thumbs, so that made 32 joints in total.

The doctors gave each patient three injections of a special gel. The gel is called hyaluronic acid. It is also called HA. The injections were given once a week for three weeks in a row.

Here is where it gets interesting. The doctors used ultrasound to guide the needle. Ultrasound is a machine that uses sound waves to create pictures of the inside of your body. It is the same machine used to see babies before they are born. This helped the doctors see exactly where to put the needle in the small thumb joint.

The doctors checked the patients at several times:

• Before the first injection (week 0)
• After one week (week 1)
• After two weeks (week 2)
• After six months (week 24)

At each visit, patients answered questions about their pain and hand function. The doctors also used ultrasound to look at the inflammation inside the joint.

What kind of gel was used?

Research shows that the doctors used high molecular weight hyaluronic acid. Let us break that down into simple words.

When arthritis wears away the natural cushion in your joint, adding this gel back in can help reduce friction and pain. The gel also may help reduce swelling.

Did the treatment help with pain?

Yes. According to this study, patients felt significantly less pain after just two weeks of treatment. The doctors measured pain using something called a visual analog scale, or VAS. This is a simple tool where you mark how much pain you feel on a line from no pain to worst pain.

The improvement in pain was strong. The study says the results were statistically significant with a p value of 0.0003 at week 2. That means it is very unlikely the improvement happened just by chance.

Let us look closer. The good news continued. The pain relief lasted. Even after six months, patients still felt less pain than before the treatment started. The p value at week 24 was 0.009, which still shows a meaningful improvement.

The doctors also used something called the Dreiser index. This is a questionnaire that asks about pain and function in your hand during daily activities. This score also got better after two weeks and stayed better at six months.

What happened to the inflammation?

Studies indicate that inflammation inside the joint also decreased. The doctors measured inflammation using something called power Doppler. This is a special ultrasound tool that shows blood flow. When a joint is inflamed, more blood flows to the area. The ultrasound can detect this extra blood flow and create a colored signal on the screen.

According to medical evidence from this study, the power Doppler signal decreased significantly after two weeks of treatment. The p value was 0.02. This means the inflammation went down.

However, this improvement did not last as long as the pain relief. At the six month check, the inflammation signal was not significantly different from the beginning. This tells us that the gel helped calm inflammation in the short term, but the effect on inflammation may fade over time.

The doctors also looked at synovial hypertrophy. This is a thick swelling of the lining inside the joint. The study found no significant decrease in this type of swelling during the study period.

About This Site

This website simplifies medical science for people living with thumb pain and rhizarthrosis. We read published scientific articles and translate them into plain language you can understand. Every article on this site comes from real medical research. We do not make up facts or give personal opinions. We invite you to explore more content and learn what science says about your condition.

Common Questions

How many injections did patients receive?

According to this study, patients received three injections of hyaluronic acid. The injections were given once a week for three weeks in a row. Each injection was guided by ultrasound to make sure the gel went into the right spot.

How long did the pain relief last?

Research shows that pain decreased significantly after two weeks and this improvement was still present after six months. Patients continued to feel better even half a year after the treatment ended.

Did the treatment reduce swelling?

Studies indicate that the treatment reduced active inflammation, measured by power Doppler signal, after two weeks. However, this effect was not maintained at the six month check. The thickening of the joint lining did not change significantly during the study.

Is this treatment safe?

This study was a pilot study, which means it was small and designed to test if the idea works before doing a bigger study. The researchers did not report serious safety problems in the abstract. However, any medical treatment should be discussed with your own doctor.

What this means for you

This small study suggests that ultrasound guided injections of hyaluronic acid may help reduce pain and inflammation in thumb arthritis. The pain relief lasted for at least six months. The reduction in inflammation was shorter.

If your thumb hurts and daily tasks have become difficult, this research offers some hope. Hyaluronic acid injections are one option that may help you feel better without surgery.

Remember, this was a pilot study with a small number of patients. More research is needed to confirm these results. Every person is different. What works for one person may not work the same way for another.

Talk to your doctor if you are interested in this treatment. Your doctor can look at your specific situation and help you decide if these injections might be right for you.

Important Information

This article is for educational purposes only. It is not medical advice. It does not replace a consultation with a qualified healthcare professional. Always talk to your doctor before starting any new treatment. Your doctor knows your medical history and can give you personalized advice.

Study Source

This article is based on research published by Ingegnoli, F., Soldi, A., and Meroni, P. L. in the Journal of Hand Microsurgery in 2011.

Read the full study here:
https://doi.org/10.1007/s12593-011-0037-8