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.
The release of histamine from cells in the epidermis of skin is usually considered to cause itchy sensations. Though strangely pleasurable, scratching can damage the skin only to make it further itchier. The most common symptoms of itchy legs are redness, bumps, spots or blisters and the worst of them all, skin dryness.Even during the process of healing, a particular wound feels itchy while growing new cells underneath the old scab to form a new layer of skin.he release of histamine from cells in the epidermis of skin is usually considered to cause itchy sensations. Though strangely pleasurable, scratching can damage the skin only to make it further itchier. The most common symptoms of itchy legs are redness, bumps, spots or blisters and the worst of them all, skin dryness.