I have a heavy weak feeling in my right hand arm and cheek. it also has a sensation of coldness. i still have full range of motion.

Hand, face coldness: Frequently sensation of numbness and coldness suggest a vascular compromise. is there any swelling or pain? Is there any compromise of motor function of your hand and arm? Are the symptoms occurring with stress or anxiety? Are you on any medications? symptoms are vague and your medical history and physical condition is important for proper evaluation. You need yo see your doctor.