Cracked mouth corner: Introduction. Cracked mouth corner: Cracked skin at the corner of the mouth. See detailed information below for a list of 10 causes of Cracked mouth corner, Symptom Checker, Assessment Questionnaire, including diseases and drug side effect causes.racked mouth corner: Introduction. Cracked mouth corner: Cracked skin at the corner of the mouth. See detailed information below for a list of 10 causes of Cracked mouth corner, Symptom Checker, Assessment Questionnaire, including diseases and drug side effect causes.
Thyroid disorders can range from a small, harmless goiter (enlarged gland) that needs no treatment to life-threatening cancer. The most common thyroid problems involve abnormal production of thyroid hormones. Too much thyroid hormone results in a condition known as hyperthyroidism.
There are two basic disorders of the thyroid: hypothyroidism, or an underactive thyroid gland, and hyperthyroidism, or an overactive thyroid gland. Hypothyroidism. The most common disorder of the thyroid is an underactive thyroid gland, or hypothyroidism.