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.
Emotional stress is less likely to cause hair loss than physical stress, but it can happen, for instance, in the case of divorce, after the death of a loved one, or while caring for an aging parent. More often, though, emotional stress won't actually precipitate the hair loss.
Other causes of hair loss, especially if it is in an unusual pattern, include: 1  Alopecia areata (bald patches on the scalp, beard, and, possibly, eyebrows; eyelashes may fall out). 2  Anemia. 3  Autoimmune conditions such as lupus. 4  Burns. Certain infectious diseases such as syphilis.  Excessive shampooing and blow- 1 drying. Hormone changes.  Thyroid diseases.