Hand is swollen, painful, sometimes much colder than the rest of body. i also have pains shooting from little finger almost to elbow. wrist hurts too.

Seek med attn: Seek medical attention. Assuming you did not have a mechanism of injury, a vascular vs rheumatologic cause needs to be evaluated.

See doctor ASAP: The coldness of the hand and the pain are worrisome for a blood clot or narrowing of one of the arteries either problem can be very serious. Sometimes, nerve entrapment or spasm in a blood vessel can do this. Get it checked out soon.