A subdural hematoma is a buildup of blood on the surface of the brain. The blood builds up in a space between the layers that surround your brain.

Aspiration is when a material like food or liquid enters your airway or lungs by accident. This can happen when you have a condition called dysphagia. Learn about treatment for this condition.

A fusion is a surgery to join two or more bones together. During a transforaminal lumbar interbody fusion (TLIF), this is done on the spine. Two of the bones of your back (vertebrae) are joined together, and one of your spinal disks is removed.

Aortic valve regurgitation is when the aortic valve leaks. In many cases, mild to moderate aortic valve regurgitation just needs to be monitored. More severe cases often need surgery. Here's what you need to know about treatment.

Hard nodules can sometimes form inside the thyroid gland. You may notice a small bump in the gland area. Thyroid nodules are common. The nodules are often not dangerous. But in some cases, they can be thyroid cancer. A thyroid FNA biopsy can test for cancer.

Aniridia means lack of an iris. It is a rare disorder in which the iris of the eye is partly or completely missing. Here are details on treatments and complications.

Here are images to help you understand how to put on thigh-high compression stockings.

These images will show you how to safely stand up using a walker.

These images show how to safely sit using a walker.

These images show you how to stand using crutches.