Moon Face - Moon Facies

What is moon face?

Moon face is swelling that builds up on the sides of your face, making it look puffy and round, like a full moon. The buildup of fat deposits in the side of your skull can make your face so round that you can’t see your ears from the front. The medical term for moon face is moon facies.

Using steroid medication like prednisone for a long time is often the cause. But it can also be a sign of a health condition like Cushing’s syndrome or hypothyroidism.

Moon face usually isn’t painful or dangerous. But since it changes how you look, it can affect your self-esteem and take a toll on your mental health.

What causes a moon face?

Moon face has several causes, including long-term steroid use and certain health conditions.

Corticosteroids

Corticosteroids like prednisone are one of the most common causes of moon face. Your healthcare provider may prescribe prednisone for different health conditions, including:

• Autoimmune diseases like lupus and Addison’s disease.
• Blood disorders like anemia.
• Certain cancers like blood cancer and lymphoma.
• Inflammatory diseases like arthritis and asthma.
• Skin conditions like poison ivy, poison oak and poison sumac.

Long-term steroid use can affect your adrenal glands, causing them to release a high amount of hormones like cortisol, a stress hormone. Over time, this hormonal imbalance can cause weight gain and water retention. This can lead to swelling and fat deposits in and around your face, and you might look like you have a moon face.

Cushing’s syndrome

When your body produces too much cortisol, it can cause Cushing’s syndrome. Cushing’s syndrome is a hormonal disorder that causes symptoms known as Cushingoid facies or Cushingoid appearance. These symptoms include weight gain, inflammation, swelling and facial rounding.

Long-term steroid use commonly causes Cushing’s syndrome, but other causes may include your pituitary gland producing too many hormones, high stress levels and tumors like:

• Adrenal adenomas.
• Pituitary adenomas.
• Adrenocorticotropin hormone (ACTH)-producing tumors.

Hypothyroidism

When your thyroid doesn’t produce enough thyroid hormone, you can develop hypothyroidism. Thyroid hormone helps break down sugar molecules in your body. If you don’t have enough thyroid hormone, the sugar molecules may build up in your skin. Sugar molecules attract water, which your body retains, causing your face to swell. Causes of hypothyroidism include:

• Autoimmune diseases.
• Radiation therapy.
• Thyroid gland removal (thyroidectomy).

What are the risk factors for moon face?

Anyone who takes corticosteroids, like prednisone, for a long time (more than a few weeks) has a high risk of developing moon face. Some evidence suggests that the condition occurs more frequently in people assigned female at birth (AFAB). People AFAB are also more likely to develop hypothyroidism or Cushing’s syndrome.

Additional risk factors for hypothyroidism include being over 60 years old and having:

• A biological family history of thyroid conditions.
• An autoimmune condition.
• Thyroid surgery.
• Radiation therapy.

Additional risk factors for Cushing’s syndrome include having:

• Obesity.
• Undermanaged type 2 diabetes.
• High blood pressure.
• A biological family history of endocrine tumors.

How is moon face diagnosed?

If you’re taking a corticosteroid like prednisone, your healthcare provider will be able to tell that that’s the cause of moon face. If you’re not taking steroids, your provider may order certain tests to check your cortisol levels, including:

• Blood tests.
• Urinalysis.
• CT scan (computed tomography scan).
• MRI scan (magnetic resonance imaging scan).

How do you get rid of moon face?

Treatment for moon face depends on the cause of your condition.

If prednisone or another corticosteroid is causing the condition, your healthcare provider may reduce your dosage. Taking a lower dosage may reduce the appearance of moon face over time. Your provider may recommend taking another steroid or stopping the steroid use altogether. But it depends on the reason why you’re taking the steroid.

Don’t stop taking your medication without speaking with your provider. They’ll want to gradually reduce your dosage to help your body adjust. If you stop taking the steroid abruptly, your body may not have the amount of cortisol it needs to function properly. This can cause symptoms such as:

• Fatigue.
• Mouth sores.
• Skin color changes.
• Upset stomach.
• Weakness.
• Weight loss.

If Cushing’s syndrome or hypothyroidism is causing the moon face, your healthcare provider will treat it as part of your condition. As part of the management of your condition, you’ll experience fewer symptoms over time, and moon face should disappear as you go through treatment.

Treatment options for Cushing’s syndrome include:

• Prescription medication to help manage your body’s cortisol production.
• Surgery to remove adrenal and pituitary gland tumors.
• Chemotherapy or radiation therapy to shrink tumors.

Treatment for hypothyroidism typically includes the use of levothyroxine, a human-made (synthetic form) of thyroid hormone.

Can moon face be prevented?

Moon face can be difficult to predict, so it’s hard to prevent. Not everyone who takes corticosteroids gets moon face. Not everyone who has a health condition like hypothyroidism or Cushing’s syndrome will get it, either. But you can reduce your risk by:

• Maintaining a healthy weight for you: Work with your healthcare provider on a nutrition and exercise plan that’ll help you lose weight all over your body, including your face.
• Reducing your salt intake: Too much salt (sodium) can cause your body to retain fluid, which increases swelling. Try to eat less processed foods.
• Drinking more water: When you’re dehydrated, your body holds onto more fluid, leading to swelling. Make sure to drink plenty of water every day.
• Getting enough sleep: If you don’t get an adequate amount of rest, it can lead to facial swelling and inflammation.

When should this symptom be treated by a healthcare provider?

If you have moon face, you may feel embarrassed or self-conscious. Your appearance to the world — especially your facial appearance — is an important part of expressing who you are. Moon face can affect your self-esteem and may lead to other issues with your mental health. If it’s bothering you, reach out to your healthcare provider. They may be able to offer alternative treatment options. In the meantime, you may want to find a support group so you can connect with and talk to other people who are experiencing what you are.

What questions should I ask my healthcare provider?

Questions you may want to ask your provider include:

• Is there a different corticosteroid I can try to treat my condition?
• Are there any other treatments I can try to avoid moon face?
• How long will it take for moon face to go away?
• Do you have any support groups you can recommend?
• How can I prevent moon face in the future?

A note from Cleveland Clinic

Moon face can make your face look puffy, round and full. While it’s a common and harmless side effect of corticosteroid use, it can affect the way you feel about yourself. If moon face is bothering you, talk to your healthcare provider about other treatment options or ways you can reduce the puffiness of your appearance. If you need to continue with your current treatment, consider joining a support group so you can connect with others in your shoes.