Hello, Some women develop sex rash due to sexual arousal or orgasm. It is caused by a temporarily increased blood flow in the skin. However, it can also be indicative of molluscum, skin colored, tiny bumps (1-2 millimeters) caused by a virus. In the genital area, they re usually transmitted by sexual contact mostly due to unprotected sex. Some people are allergic to semen and hence develop allergy symptoms that include a change in skin color, sores, burning and swelling wherever semen comes in contact with the skin or vaginal tissues. Get clinically examined by a Dermatologist to be on the safer side. Herpes sores develop around the mouth and nose, neck or genitals, but they can appear nearly anywhere on the body. Herpes rash or sores appear when you contract the infection. Get clinically evaluated, get STD tests done. You will be treated with antibiotics / antivirals. At present, take care of your hygiene. Keep skin clean. Do not touch or scratch. You can take a course of Doxycycline for 5 days. It should subside. Avoid applying makeup or wearing jewelry for a couple of days while you will be treated. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician