Please from last 25 days i feel pain in my neck and right arm shafting from one place to another .in night i can not sleep on right side ?

Pinched nerve: Sounds like a pinched nerve in your neck. Go see your doc. These can usually be treated with meds and physical therapy.

Certain conditions: That are potentially serious should be "ruled out." among them are cervical nerve root irritation, entrapment or muscle tension creating strain on other structures. Symptoms lasting almost a month suggest the need for a neurological consultation.