I get small pink rash on penis head which will go within 2-3 days upon keeping area dry. Minimum skin will go off while washing. Sometimes there will be slight itch in foreskin. It is coming and going for some time. I visited dermatologist earlier in August and finished a course of FZHh tablet. One per week for four weeks but the issue is coming back again. No lab tests were done. Is it some STI or STD? I didn't have any other symptom, even a cold or fever in the last 1 year. Attached a photo as well. Little worried as it is coming back.