Hello,
You are having bumps at the penis shaft after you had sex with your partner while she was menstruating. Menstrual blood is composed of old parts of uterine tissue, cells from the mucus lining of the vagina and bacteria making up the
vaginal flora & blood. Older blood can cause irritation or
allergic reaction causing bumps if penetrative unprotected sex is done.
You are suggested to take care of your hygiene, abstain from sex or any sexual activity for a couple of days, let the bumps heal. You can apply ointment
acyclovir on the affected area. Take non sedating antihistamines for 3-5 days to reduce allergic reaction. It should go away.
Doing sex without protection during periods is the risk of getting sexually transmitted infection (STI) like
HIV or
hepatitis. These viruses live in blood, and can spread through contact with infected menstrual blood. Always wear condom to stay protected from STIs. Presently, you are suggested to get clinically examined by a
Urologist. Get
STD tests done. If positive you will be treated with antibiotics and antivirals. Avoid multiple partners.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Nupur K., General & Family Physician