Hi there. Some amount of vaginal discharge is normal during middle few days of your cycles.. but if there is more discharge, everyday, associated with foul smell, itching then it is abnormal vaginal discharge and it's caused due to infections like vaginal candidiasis, gonorrhoea, chlamydia, bacterial vaginosis, trichomoniasis and in vaginitis, or in females who have diabetes or who are using birth control pills. What is the cause could be found by culture of discharge. Treatment of vaginal discharge depends on cause. For infections, Anti fungals antibacterial agents in the form of cream for local application and oral tablets. General prevention measures include wash private parts regularly with mild soap and warm water, and patt dry with clean cloth. All infections spread to and from other partner. So I suggest you to take protection whenever you have sex and even the other partner has to get treated. Please consult gynecologist once.