Hypothyroidism is the most common type of thyroid disorder. It means your thyroid gland is not active enough. This tiny gland is found in your neck. Its job is to make thyroid hormone. If the gland is underactive, it may not make enough thyroid hormone.

Detailed information on the most common types of rosacea, including prerosacea, vascular rosacea, inflammatory rosacea, and rhinophyma.

Hyperparathyroidism occurs when 1 or more of your parathyroid glands are overactive. You have 4 of these tiny glands. Each 1 is about the size of a grain of rice. They are found in your neck, next to the thyroid gland. They keep the amount of calcium in your blood in a normal range. If these glands are overactive, they make too much parathyroid hormone (PTH). That raises the level of calcium in your blood.

Your body has 2 adrenal glands. They are found on top of each kidney. The adrenal glands make certain types of hormones. If they make too much of (overproduce) these hormones, they are called overactive.

Detailed information on molluscum contagiosum, including causes, symptoms, diagnosis, and treatment.

Detailed information on hormones and their role in the workings of the endocrine system

Detailed information on keratosis pilaris, including symptoms, diagnosis, and treatment.

Detailed information on different types of skin injury, including blisters, burns, and sunburn

Detailed information on ingrown hairs, including symptoms, diagnosis, and treatment

Detailed information on different types of skin infections, including bacterial, fungal, viral, and parasitic skin infections