Pain/numbness in hands and wrists, but emg came back normal. my doctor thinks it might be tendonitis, but cold makes it worse. what else could it be?

Numbness: Low thyroid can be the culprit for many annoying symptoms especially numbness, coldness, dry skin, and even tendonitis, plus many more. I would recommend a good supplement with l-tyrosine, selenium and iodine, which are usually depleted and necessary to adequately make thyroid hormone.

A normal emg and : Nerve conduction does not mean that there is no nerve irritation but that it is just not severe enough to register on that test at that time. Tendinitis is a source of discomfort but does not usually cause numbness think of other sites of compression, metabolic endocrine and circulation as well. Don't forget your neck and shoulder as well , a good exam may narrow down these sites and recheck othe.