When you have sex with a woman, the leucorrhoea may be physiological factors, but also may be pathological factors, pathological factors are common vaginitis, cervicitis, pelvic inflammatory disease and so on. 1. Physiological factors: because women in the same room, due to the role of sexual excitement is easy to stimulate the secretion increase, manifested in the phenomenon of increased leukorrhea. 2. Vaginitis, cervicitis: if you suffer from gynecological inflammation, then due to bacterial stimulation, resulting in increased shedding of cervical cells or vaginal cells, which can also lead to an increase in leukorrhea. 3. Pelvic inflammatory disease: If vaginitis or cervicitis can not be controlled in time, then it will be retrograde infection to the pelvic cavity, triggering pelvic inflammation, which will also cause an increase in leukorrhea. If you usually have abnormal increase in leukorrhea, then it is recommended to consult a doctor in time to find out the cause of the problem, to avoid delaying the condition.