###Human: Will candidiasis cause red bumps on penis after sex? ###Assistant: Hi. It can be candidiasis or some allergic reaction. You can apply Miconazole cream locally twice daily for about 10 days and see. If it increases or recurs, see a doctor. Please use a condom until both of you are adequately treated, to prevent cross infection. The pain during sex could be due to stretching of the frenulum, the fold at 6 o'clock below glans. If it tears repeatedly, a minor corrective surgery helps. Take care.