1 Cold sores later crust over with a scab and are usually associated with tingling, tenderness, or burning before the actual sores appear. 2  Mouth irritation. 3  The irritation can be caused by: 4  Biting your cheek, tongue, or lip. 5  Wearing braces or another type of dental apparatus, or having a sharp, broken tooth.
Main Image: The Pituitary gland is a pea-sized endocrine (hormone-producing) gland weighing about 0.5 g situated at the bottom of the skull sandwiched between the optic nerves, in humans. The pituitary gland secretes hormones. Hormones are chemicals that travel through the blood stream.
The primary function of your thyroid gland is to secrete thyroid hormones, which are responsible for controlling your bodyâs metabolism. The 2 main thyroid hormones are T3 (triiodothyronine) and T4 (thyroxine).The amount of thyroid hormones secreted is controlled by another hormone, called thyroid stimulating hormone (TSH), which is released from the pituitary gland in your head.alcitonin. Another hormone thatâs produced in your thyroid gland is called calcitonin. This hormone, secreted by a small population of cells known as C cells, is involved in regulating the level of calcium in your blood.