Bloody splits in fingers, bilateral - primary doc says autoimmune. Steroid cream clears, then recur. Continued cream clears permenant. Fungus? Bacteri

See rheumatologist. Recent advances in rheumatology- a plenty - probably better med than steroid available now.
Can not be certain. There is a term called mechanics ahnds that can occur in certain immune disease. You can also have this occur in psoriasis. Are there circulatory issues, raynauds, smoking, etc we need more data to help clarify your dilemna. A dermatologist can clarify this issue.