ven when you are resting or at night.Before having surgery, your doctor will do special tests to see the extent of the blockage.RisksRisks for any anesthesia are:Allergic reactions to medicinesBreathing problemsRisks for any surgery are:Blood clots in the legs that may travel to the lungsBreathing problemsHeart attackstroke or Infection, including in the lungs, urinary tract, and bellyRisks for th