Finger hurts and this happens all the time?

i was playing football and i caught the ball wrong and i hurt my finger and now it hurts ? and tgis always happned to me not the cathing mistake but my body always gets hurt every single way from getting cramps on my sides and getting hit on the ankle and hitting my funny bone -.- this happens as karate,football,track and everything else does anyone know any way to get rid of any of these pains?