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Your body needs calcium to build and repair bones. But it can't make calcium on its own. That's why it's important to eat calcium-rich foods. Some foods are naturally rich in calcium. Others have calcium added.

Step-up exercises help stretch and strengthen your knee. Learn how to do this exercise.

A helpful guide to the inner ear, complete with a diagram.

Infusion therapy is a safe way to take medicines or fluids that can’t be taken by mouth. Instead, they flow through a flexible tube (catheter) that’s placed in a vein—usually on your arm or chest. This is called the infusion site.

Tympanoplasty can repair a damaged eardrum, stop infection, and improve hearing. During surgery, you may be given general anesthesia, or local anesthesia with sedation. Tympanoplasty takes about 1 to 3 hours. It may be done along with a mastoidectomy or an ossicular chain reconstruction. The eardrum is at the end of the ear canal.

Infusion therapy is a safe way to take medicines or fluids that can’t be taken by mouth. Here's how to prevent infection when doing infusion therapy at home.

Your supplies need to be kept sterile. Otherwise, they aren’t safe to use. Inspect, store, and dispose of supplies as directed by the nurse.

Radiation therapy can help you in your fight against cancer. To feel better, get plenty of rest, exercise, and eat well. This will give your body the extra strength it needs right now. Also look to family and friends for support and comfort.

From sinus infections to conjunctivitis, a look at common problems caused by nasal allergies.