3 doctors weighed in:

My boyfriend has Crohn's disease and he has these lumps on his back. What are they? Circular and they itch. They are about the size of a plum.

3 doctors weighed in
Dr. Dominic Riganotti
Internal Medicine - Infectious Disease
2 doctors agree

In brief: Ringworm

It could be fungal.
The best way to tell is a skin biopsy if he goes to see a dermatologist. If he's had this a long time it may not respond well to topicals. Oral treatment requires a prescription.

In brief: Ringworm

It could be fungal.
The best way to tell is a skin biopsy if he goes to see a dermatologist. If he's had this a long time it may not respond well to topicals. Oral treatment requires a prescription.
Dr. Dominic Riganotti
Dr. Dominic Riganotti
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Dr. Christopher Crosby
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