Purple knuckle: May be bruised (blood under skin) , especially if you are on aspirin or coumadin (warfarin) blood thinners. Check with you doctor if not better in a few days.
Answered 7/6/2015
2.6k views
5 doctors weighed in across 3 answers
4 doctors weighed in across 3 answers
7 doctors weighed in across 3 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question