Teen health
Learning Center
Ileoanal anastomosis (J-pouch) surgery
This surgery removes the large intestine. It's often done to treat ulcerative colitis and other bowel conditions.
Hypnosis
Find out about this changed state of awareness and the conditions it may help.
Hyperbaric oxygen therapy
This type of therapy is a well-known treatment for decompression sickness, but it has many surprising uses. Find out about why and how oxygen can heal the body.
Hormone therapy for prostate cancer
Find out what to expect during testosterone-blocking therapy. Learn about choices, including medicines and surgery.
Hormone therapy for breast cancer
Find out how hormone therapy is used to treat breast cancer. Learn about risks and what to expect during this treatment for ER and PR positive breast cancers.
Hormonal IUD (Mirena)
This birth control device gives long-acting protection that can be reversed.
Home parenteral nutrition
Learn about home parenteral nutrition treatment at Mayo Clinic and the situations in which this specialized form of food infused through a vein is used.
Home enteral nutrition
Learn how Mayo Clinic specialists help you maintain your feeding tube at home.
Holter monitor
This wearable device keeps track of the heart's rhythm during daily activities. Learn when you might need one and what to expect.
Hip replacement
Hip replacement may be an option if your hip pain interferes with daily activities and nonsurgical treatments haven't helped.
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