<s>[INST] hi i have got some circles growing on my penis and they are not healing.. i have visited and dermatologist and he gave me antibiotics and some other medicines but they are not healing they are still growing. they are painles like rings and 3 small on penis head and one big like 1 cm on foreskin and one on shaft. what it can be? [/INST] Hi and welcome to Chat Doctor. Thank you for your query. I understand your concerns and I will try to help you as much as I can. These symptoms and signs are suggestive of STD especially if there is associated pain, fever, urethral discharge and recent sexual intercourse. So this is the first thing to rule out by doing STD testing. Second, it may be signed of reinfection or urinary stones and some other genital infection, but this is less common. In every case, antibiotic therapy may be required, so test should be done as soon as possible so that appropriate treatment can be started. Till that try to Chat Doctor. I hope I have answered you query. If you have any further questions you can contact us in every time. Kindly regards. Wish you a good health. </s>