Ive been getting short sharp shooting pains in my chest. i know that most people experience this, i have before, only now its frequent. why?

Chest pains: Such sharp, shooting chest pains,especially if brought on with a deep breath, are often due to pinched intercostal nerves or muscles which run between two ribs. Absence of cough makes a lung problem unlikely. Generally these symptoms resolve on their own, but if they persist,change or worsen, see your physician for evaluation. A chest X-Ray may be advised.