<s>[INST] I have a spot on my penis which almost resembles a bruise but it is seeping an almost yellow substance. I ve read about busted blood vessels and how they will look like a bruise but not understanding where the secretion is coming from. I am a married man and have been for 16 years and we don t get crazy. We are monogamous to one another. [/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. It may indicate herpes infection and this is the first thing to think of. In every case 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>