Trichomonal vaginitis tends to recur after menstruation. During menstruation, the body's resistance is lowered, and the cervix is in an open state, making it easy for pathogens to invade and cause a recurrence of trichomonal vaginitis. The characteristic manifestation of trichomonal vaginitis is the discharge of thin, purulent, yellow-green, foamy secretions with a foul odor. The main clinical symptoms include an increase in vaginal discharge, itching or burning pain in the vulva, pain during sexual intercourse, etc. Generally, once trichomonal vaginitis is diagnosed, it can be treated under a doctor's supervision. However, it is important to note that trichomonal vaginitis is mainly transmitted through sexual contact. Sexual partners should be treated simultaneously, and sexual intercourse should be avoided during treatment to greatly increase the likelihood of cure and reduce the possibility of recurrence. Please follow the doctor’s advice and accurate diagnosis for specific treatment. If you have further questions, please consult a doctor at a hospital.