No one likes to walk around with large bruises on their arms or legs, but if you are currently taking the drug known as Plavix, which might be exactly what you are dealing with. Plavix is a drug that is routinely recommended for a number of different issues, but one thing that people who are on this drug frequently note is that it is a drug that can quickly cause them to be subject to severe bruising. While they are not doing anything differently, they find that normal or routine contact during their day-to-day life will subject them to large bruises, often with a hard center. Though these bruises do not really cause any harm, they are irritating, ugly, and you certainly want to know what is taking place.