I have a bump similarto a boil near my scrotum sac in the thigh fold .what it could be .its thre for arround a week .

Boil in Groin: Many things can cause boils in the groin area. They include: ingrown hair. Result of a splinter or other foreign material that gets lodged in the skin. Plugged sweat glands that become infected. Any break in the skin, even a small cut or scrape, can develop into an abscess, which can become infected with bacteria and needs to be treated by a physician.