These are small, pink, cauliflower shaped growths on the penis, vulva (female external sex organs) or rectum. The number can vary. They don't cause any symptoms but may be itchy. They can not only be a sign of an STD but also cancer. They are very contagious. There is treatment for warts but it MUST be obtained from your doctor or local GUM clinic. It can take a long time for symptoms to appear after infection.