Discover how allergies can cause swollen lymph nodes, and learn to distinguish between normal immune responses and warning ...

Medically reviewed by Daniel More, MD Allergies occur when your immune system overreacts to allergens like pet dander, pollen ...

It can be a little gross, but experts say sweating is completely normal, as is a little variation in the quantity and scent.

Thyroid cancer is a type of cancer that starts in your thyroid gland. A gland is an organ in your body that makes a substance. Your thyroid is shaped like a small butterfly and is found inside the ...

Your body clock regulates hormones that impact mood, metabolism, and sleep. Learn how to align your lifestyle with your circadian rhythm.

Health experts have warned that a cough lasting more than three weeks could be a sign of a deadly disease making a comeback ...

Our bodies are regulated by hormones which are chemicals that allow communication between different cells and parts of the body. Endocrine glands release hormones into the bloodstream. Hormones ...

That's the work of sebaceous glands, also known as oil glands. You have sebaceous glands all over your body, including your areolas, which are the dark circular skin areas surrounding your nipples.