Hi and welcome to HCM. Thank you for your querry. It sounds like STD and this must be ruled out first,but some other disorders can cause it as well such as follciultis, allergy reaction, irritation or sebaceus gland inflammation. YOu should do urethral swab test to investigate the exact causative agent. It can be viral or bacterial infection. if there is discharge,pain while urinating or pain in testicles it can be bacterial STD. Most common viruses are herpes, hpc and molluscum contagiousm. Before tests ,visit your gp or pharmacist and ask for some antiviral and antifungal local treatment. Wish you good health.