<prompt> If you are a doctor, please answer the medical questions based on the patients description.hello, im a 16 year old boy and have this pimple like thing on my scrotum. its very toughhard around the head of the pimple like thing and its slightly red and very sensitive. ive had this for about 3-5 day. my father says it s just a staff infection, but im not sure what it really is. could you help me?  <response>: Good Day, and thank you for being with Chat Doctor ! Yes it is usually caused by the bacteria Star. Aureus. It is generally a pimple in the scrotum. Just wash it with soap and water every day, and it will go away on its own like any other pimple. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: .comdoctors Chat Doctor. Best wishes. 