1 An adenoma is a part of the gland that has walled itself off from the rest of the gland, forming noncancerous (benign) lumps that may cause an enlargement of the thyroid. Not all adenomas produce excess T-4, and doctors aren't sure what causes some to begin producing too much hormone.  Thyroiditis.
Scratching Itchy Skin Causes Brain To Release Hormone Serotonin, Intensifies Itchy Sensation. While a good scratch may temporarily relieve you of your itch, it actually stimulates serotonin in the brain that intensifies the itchy feeling.
As your bodyâs largest organ and its first line of defense, your skin can sometimes reveal a medical condition thatâs affecting you. Whether you have red skin thatâs hot to the touch, skin bumps that itch, or a skin rash that just looks unusual, changes in your skin are nothing to ignore.Here are some of the most common skin symptoms and why they might occur. Skin Symptom No. 1: Red Skin. Here are possible causes of red skin: 1  Rosacea.hether you have red skin thatâs hot to the touch, skin bumps that itch, or a skin rash that just looks unusual, changes in your skin are nothing to ignore. Here are some of the most common skin symptoms and why they might occur. Skin Symptom No. 1: Red Skin. Here are possible causes of red skin: 1  Rosacea.