<s>[INST] Hi, I never had anything like this happen before but I have a pimple right under my penis head. It was annoying so I popped it and not it looks like a crater with a little bit of inflammation in it. Should I be worried or should I just treat it like any other pimple? [/INST] So it is essentially a penile ulcer. Have you had any unprotected sexual encounters in the recent past? If yes then you should get yourself tested for Sexually transmitted diseases. Till then you should keep it clean and dry and avoid any contact with clothing. Is it covered by prepuceal skin or exposed? Do let me know. you can contact through the 'Fix an appointment' tool. Take care and look forward to hearing from you. </s>