Overview
The pituitary gland is a small gland located beneath the brain. It releases hormones that influence growth, stress response, reproduction, thyroid function, and water balance. Pituitary disorders happen when the gland makes too much hormone, too little hormone, or is affected by a growth or other damage.
Key Symptoms
Symptoms depend on which hormones are affected and whether the gland is pressing on nearby structures such as the optic nerves. Common symptoms may include headaches, changes in vision, tiredness, weakness, weight changes, menstrual changes, reduced fertility, low sex drive, or unexpected milk production. Some people develop changes in height or body size, increased thirst and urination, or symptoms linked to low thyroid or adrenal hormone levels.
Causes and Risk Factors
Pituitary disorders can be caused by noncancerous pituitary tumors, reduced blood supply to the gland, head injury, surgery, radiation, inflammation, infection, or rare genetic conditions. In some cases, the problem begins in the hypothalamus, the part of the brain that helps control the pituitary gland. Pregnancy-related complications and certain medicines can also affect pituitary function in some people.
Who Is Affected
Pituitary disorders can affect children and adults of any sex. Different disorders are more common at different ages, depending on the hormone involved. Because symptoms may be vague or develop gradually, some people may live with a pituitary condition for a long time before it is recognized.
Diagnosis and Tests
Diagnosis often starts with a medical history and physical examination, followed by blood and sometimes urine tests to measure hormone levels. Doctors may use dynamic hormone testing to see how the gland responds under certain conditions. MRI of the pituitary area is commonly used to look for growths or structural changes, and vision testing may be needed if there are eye symptoms.
Treatment Categories
Treatment depends on the specific disorder and its cause. Options may include monitoring, hormone replacement, medicines to lower hormone overproduction, surgery, or radiation therapy. Care is often guided by an endocrinologist, and some people also need input from neurosurgery or eye specialists.
Living With It
Many pituitary disorders need long-term follow-up because hormone levels can change over time. Regular blood tests, scans, and symptom review may be needed even after treatment. Keeping a record of symptoms, medicines, menstrual changes, thirst, urination, and vision changes can help with ongoing care.
When to Seek Medical Care
Arrange medical evaluation if you have persistent headaches, vision changes, unexplained fatigue, menstrual changes, fertility problems, unusual body growth, reduced sexual function, or major changes in thirst and urination. Seek care if symptoms appear after childbirth, head injury, brain surgery, or radiation treatment. Early assessment is important because untreated hormone problems can affect many organs.
When It May Be an Emergency
Get urgent medical help for a sudden severe headache, sudden vision loss or double vision, fainting, confusion, severe weakness, vomiting, or signs of very low blood pressure. Emergency care is also needed if a person with known pituitary hormone deficiency becomes seriously unwell, especially with collapse or reduced alertness. These can be signs of pituitary apoplexy or adrenal crisis, which are medical emergencies.