Thanks for writing to us.
Pain in the arm and below breast could be related to overuse causing a muscular pain
or due to cervical spondylosis
. Feeling asleep of hand is suggestive of nerve root
irritation or vitamin B complex deficiency. You need to consult an orthopedician for a physical examination and proper treatment.
I hope this information has been both informative and helpful for you.
Dr. Praveen Tayal