The starvation causes their body functions to slow down. Menstruation may stop. Breathing, pulse and blood pressure rates drop. The thyroid gland slows down. Nails and hair become brittle, and the skin dries and yellows.
Constipation is also common.
In severe cases, the bones thin out, and heart and kidney problems develop that can lead to death. Treatment may involve trying to normalize eating behavior and change attitudes about food, eating, and body size. It may also include medication, psycotherapy, behavior modification, and nutrition counseling.