 [ Symptoms ] red rash on buttocks 40 yr old wm 6 mths ago i noticed a small rash on my upper buttocks above the crack its red bumps clustered in about a 2x2 inch area they dont hurt leak or itch if i did not happen to touch them i wouldnt know they were there i have googled over past 2 days an i come up with everything from eczema to shingles to cancer etc ideas i started using hydrocortisone yesterday but i will make appt to see my derm thanks for advice insight an please rule out anything you see fit like cancer etc [ Disease ] you can see this eruption i cannot so seeing your dermatologist is the appropriate next step a description is really not sufficient to make an accurate dermatological diagnosis let alone rule out such obscure things as skin cancer there can be hundreds of reasons incidentally it would be highly unusual to have cancer in this area so do not worry too much just have your dermatologist make this important call