Could Purplish Bruising On Arms Be Due To The Usage Of Plavix?

I am a 65year old male. I have been taking Plavix for about 6years. Lately I have noticed severe purplish bruising on my arms from no apparent injury. They take weeks to start clearing up, and then I will get more of them in different locations. I started Plavix when I had a blood clot on my left leg which was successfully treated. Are there other blood thinners I could take that won t cause this problem? I won t be able to wear short sleeved shirts this summer without people asking questions.