pain
"After purchasing the medicine  for shoulder pain I followed directions and applied 4 times a day. The second day the applied area ( upper arm and shoulder ) was turning dark. By the end of second day the arm was black swollen and painful. Emergency room visit did not provide any relief other than telling
Me to discontinue use of gel. I have a artificial heart valve that requires that I take blood thinner which was discussed with the prescribing physician and had been used as prescribed. The arm continued to swell and the blackness continued down the arm with pain that became unbearable. A ambulance was summoned to take me back to the hosital emergency room personnel could not diganose the situation completely and I was admitted to the ward. Surgery was required"