Canker sores (aphthous ulcers or aphthous stomatitis) are small, painful ulcers inside the mouth. They may occur on the tongue and on the inside linings of the cheeks, lips, and throat.They usually appear white, gray, or yellow in color, with a red border.anker sores (aphthous ulcers or aphthous stomatitis) are small, painful ulcers inside the mouth. They may occur on the tongue and on the inside linings of the cheeks, lips, and throat.
There are many reasons why someone may lose their hair. 1. Genetics. As mentioned above, male pattern baldness (MPB) is the most common hair loss condition in men, that occurs when hair recedes from the top and front of a maleâs scalp, creating a horseshoe-like band of hair around the sides of his head.
Bouts of alopecia areata generally come and go. Credit: Duncan Creamer/Flickr, CC BY Causes. Alopecia areata occurs when the body's immune system mistakes hair follicles as foreign and attacks them. This causes the hairs to fall out. This specific form of autoimmunity is a lifelong tendency that can be inherited from either parent.