Are my painful leg bumps connected to ulcerative colitis?

Question

Hello doctor,

I am 34 years old female, and I have been living with ulcerative colitis for the past five years. Recently, I started having severe joint pain in my knees and ankles, even on days when my stomach symptoms are under control. My CRP is 42 mg/L, and ESR is 68 mm/hr.

The rheumatologist said it might be related to my bowel disease, but did not give me a clear answer.

I am currently on Azathioprine 100 mg, and it makes me extremely tired all the time. My liver enzymes were slightly elevated last month - ALT was 67 U/L, and AST was 58 U/L- and now I am worried the medication is damaging my liver.

The joint swelling is so bad some days that I cannot walk to the bathroom properly. I also developed these painful red bumps on my legs, which my dermatologist called pyoderma.

Are these connected to ulcerative colitis? My periods have also become very irregular since I started the medication, and I want to plan a pregnancy in the next year. However, I have a few questions,

Is Azathioprine safe if I want to conceive?
Are these symptoms connected to ulcerative colitis?

Nobody is giving me a straight answer, and the symptoms from multiple places at the same time are becoming very overwhelming to manage.

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

Your symptoms suggest extra-intestinal manifestations of ulcerative colitis, which means inflammation related to the bowel disease can also affect other organs, such as joints and skin. Joint pain in the knees and ankles is common and is called enteropathic arthritis.

It can occur even when bowel symptoms seem controlled and often correlates with raised inflammatory markers like your CRP (C-reactive protein) 42 mg/L (milligrams per liter) and ESR (erythrocyte sedimentation rate) 68 mm/hr (millimeters per hour).

The painful red bumps on your legs may be:

Pyoderma gangrenosum.
Erythema nodosum.

Both are known skin manifestations associated with ulcerative colitis. These occur because the immune system driving the bowel inflammation can also affect the skin.

Regarding treatment, Azathioprine is commonly used for maintaining remission in ulcerative colitis. Fatigue can occur, and mild elevation of liver enzymes may happen, with ALT (alanine aminotransferase) at 67 U/L (units per liter) and AST (aspartate aminotransferase) at 58 U/L (units per liter).

Usually, doctors monitor liver tests regularly and adjust the dose if levels continue rising. It does not always mean permanent liver damage, but it should be reviewed by your gastroenterologist.

For pregnancy planning, Azathioprine is generally considered safe during conception and pregnancy when the disease requires it, because uncontrolled inflammation is usually a greater risk than the medication.

Many women with inflammatory bowel disease have healthy pregnancies while continuing treatment under specialist supervision.

Your joint symptoms, skin lesions, and elevated inflammatory markers suggest that overall disease activity may need reassessment.

Your gastroenterologist and rheumatologist may consider optimizing therapy or evaluating biologic options that can help both bowel and joint inflammation.

Because multiple systems are involved, coordinated care with gastroenterology, rheumatology, and dermatology is important. With proper treatment adjustment, these complications can often be controlled, and pregnancy planning can still proceed safely.

I hope you are satisfied with my answer. For further queries, you can consult me at iCliniq.

Thank you.