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.
your skin will itch and maybe burn when something is irritating or damaging your skin you ll probably see a rash right away with an allergy it may be a day or two before the rash shows up symptoms of a contact allergy are usually right around where you touched the thing you re allergic to irritant contact dermatitis skin damage tends to be more painful than itchy