Bruise on left thigh which is on going for a few months now very itchy and feels a little hard underneath the skin After I scratched from the bad itching I bruised myself even moreWhat could this be from I have had the same bruise on my upper left thigh for a few months now. It is on going. sometimes it will be faded and then sometimes it is very dark. I do not recall bumping into anything or hitting my leg. It is very very itchy sometimes, I will scratch it do death but get no relief until i take my mind off it. I also get bruises on my right leg but not as frequent. I also keep getting heart palpitations. I have an ED also. I am getting help in that area but I dont know wether my symptoms are enough for a trip to the doctor/ ER. please help. Thank you!