I'm a resident of india.I've undergone an open heart surgery (TOF)on 1982.My health is in good condition if i'm not straining much.(i.e. taking rest between the works). Sometimes guidiness after over sweating occurs without any reasons and mild chest pain occurs when i work continuously.I've hypothyrod. My BP is normal.My age is 37.My son is 14 years old.pleas tell me the do's and dont's to keep my health in good condition.