I have hypothyroidism and and having worst pain in the wrist joint . is it a symptom of carpel tunnel syndrome ?

Look for other cause: Carpel tunnel syndrome is more common in people with hypothyroidism, but if you are on treatment, and are on an appropriate dose, this should not occur. Of course you can get carpel tunnel from many repetitive motions (like typing, mousing) regardless of thyroid. Have your wrist checked out.

Could be: Many people with thyroid disorders do develope numbness and tingling in their hands, and sometimes feet. This usually occur at night or upon awakening in the morning. These symptoms often persist even when your thyroid level returns to normal. Hypothroidism can cause some generalized joint achiness, not specific to wrist. Get it checked out.