PAIN, NUMBNESS, TINGLING
You may feel pain, sometimes suddenly, in your neck or arms along with numbness and tingling in the arm and hand. Usually the pain gets worse when you lift your arms or with repetitive overhead motion.
SWELLING, BLUE DISCOLORATION, FATIGUE
Your arms and hands may be swollen and appear blue, and easily tire.
SORES THAT RESIST HEALING
You may develop sores on your fingers that are slow to heal and could lead to gangrene.