You sctached the arm: I believe that during sleep, you scratched your arm unconsciously. Other possibilities are 1. There is a splinter or nail sticking out somewhere off you bed, 2. Mosquitos or insects sucked you blood during your sleep, or 3. A remote possibility that you may have a bleeding disorder.
Answered 8/5/2013
5k views
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question