Herpes? I've had off and on mild itchiness (my doctor thought was just irritation from scratching) and I had a sore from scratching (healed in a week)
HSV 1&2 EVALUATION. It may be HSV2 or 1 Genitally , it can be transmitted via oral sex. HSV LESIONS TEND TO BE PAINFUL. See your doctor with next flare and get labs checked. Acute flares of HSV RESPOND TO FAMVIR&VALTREX. Most importantly to realize virus may be spread even without visible lesions. You need to have a frank discussion with past & present sex partners. Especially if they test-for HSV1&2.
See a dermatologist. Herpes is seldom itchy. The question is otherwise too vague for any other comment.