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.
What are endocrine glands? Endocrine glands are glands of the endocrine system that secrete  their products, hormones, directly into the blood rather than  through a duct. The endocrine system containâ¦s glands that release  certain hormones for growth/body functions/body reactions. It  consists of eight major parts:   pituitary gland  pineal gland  thyroid gland  parathyroid gland  adrenal gland  pancreas  ovary  testis   .