When i take a deep breath sometimes it makes me cough why?

Hard to say: It is best to do an exam to begin understanding lung issues. A deep breath can stir up issues by re-expanding lazy/deflated areas that may have excess mucus or other features involved. A cough is a reflex designed to bring debris/mucus forward from deep in the lung. Without an exam I can only speculate.

Agree with Dr. F: You should try to take deep breaths more often. It would help if you were to exercise regularly, 30 minutes/day, 5 days/week. Gradually increase the intensity of your exercise. Have a healthy diet, exercise, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine Nutrition: http://www.choosemyplate.gov/.