This condition may occur from simple mood disorder
to physical any abnormality. Psychologically before sex, it is an important thing to have a happy mood and confidence. Lot of people are very haste and jump into it without taking time. And this fails to get satisfaction causes fear
during sex and lack of confidence results. Another thing if the body is physically fit and free of any diseases the vigor and vitality will keep all the functions normally without any medicine. Do exercise regularly for half an hour, eat quality of food, timely and systematically ,there is a natural wellbeingness cherish always from it.