Alopecia Universalis: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Alopecia Universalis?
A dermatologist, a skin doctor, usually treats alopecia universalis. This doctor can diagnose the hair loss and explain treatments that may help hair regrow. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is alopecia universalis?
Alopecia universalis is a rare form of a disease called alopecia areata. Alopecia universalis means a person has lost all the hair on their scalp and everywhere else on their body. It happens when the immune system attacks hair follicles, the tiny parts of the skin where hair grows. The condition does not permanently damage the follicles. That is why hair may later regrow.
Symptoms
The main sign is total hair loss on the scalp and everywhere else on the body. Unpredictable cycles of hair loss followed by regrowth can last for years. Few people with extensive hair loss regrow their hair without help.
Some people also have fingernail and toenail changes. These include pits or tiny dents on the surface of the nails, brittle nails, or crumbling nails. In some people, the condition can lead to depression, anxiety, and other emotional issues.
Causes and who gets it
Alopecia universalis is an autoimmune disorder. In autoimmune disorders, the immune system malfunctions and attacks the body's own tissues instead of germs. For reasons that are unclear, it targets hair follicles and stops hair growth.
The causes are complex and not well understood. Changes in many genes that work in the immune system likely play a part. Environmental factors, such as emotional stress, physical injury, or illness, may trigger it in people who are at risk. Alopecia areata affects people of all ages. It most often starts in adolescence or early adulthood. It affects men and women equally.
How doctors diagnose it
A board-certified dermatologist can often diagnose the disease. The doctor looks carefully at the areas with hair loss and at your nails. To get a closer look, the dermatologist may use a dermatoscope, a tool that magnifies the skin. The dermatologist will also ask about your health and which diseases close blood relatives have. Sometimes the doctor removes a few hairs or does a biopsy. A biopsy removes a small amount of skin so it can be examined under a microscope. You may also need a blood test to look for thyroid disease and to check your iron and vitamin levels.
Treatment
No one treatment works for everyone, and treatment is not always recommended. For widespread hair loss, a treatment plan may include contact immunotherapy or a JAK inhibitor.
Contact immunotherapy puts a chemical on the skin with hair loss. The goal is to get the immune system to stop attacking your hair follicles. Success in growing hair ranges from 17% to 75%. You need weekly visits to the dermatologist's office.
A JAK inhibitor is a pill that calms the overactive immune system. This may allow your hair to regrow. Many studies show that a JAK inhibitor can give patients 50% or greater regrowth. The FDA has approved three JAK inhibitors to treat alopecia areata. Baricitinib treats adults with severe alopecia areata. Ritlecitinib treats adults and children 12 years of age and older with extensive hair loss. Deuruxolitinib (Leqselvi) treats adults with severe alopecia areata. Deuruxolitinib (Leqselvi) can cause serious side effects. These include serious infections, cancer and immune system problems, blood clots, and an increased risk of heart attack, stroke, or death. Other JAK inhibitors can also cause serious problems, such as blood clots, pneumonia, or tuberculosis. Tell your dermatologist if you have had a heart attack, stroke, blood clot, or cancer. Regular checkups with the doctor are needed.
After hair regrows, minoxidil (Rogaine) can help you keep the new hair. A dermatologist may also prescribe other medicines that work throughout the body, such as prednisone or methotrexate. Many people use a wig or a scalp prosthesis, a custom-made wig, to cover hair loss.
When to see a doctor
See a board-certified dermatologist if you lose all the hair on your scalp or body. The doctor can evaluate your situation and suggest what to do. If you take a JAK inhibitor and think you have an infection, get care right away. Call 911 for chest pain or discomfort lasting two minutes or more, trouble breathing, sudden weakness or trouble speaking, or thoughts of suicide. Some people with alopecia areata are at risk for other autoimmune diseases.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Your doctor can check your thyroid and vitamin levels with blood tests. They can also coordinate your care with a dermatologist and help manage long-term follow-up.
Common questions
Does hair grow back?
Yes, hair can grow back, but it may fall out again. Unpredictable cycles of hair loss followed by regrowth can last for years. Few people with extensive hair loss regrow their hair without help.
Is alopecia universalis painful?
No. The hair loss is not painful or disabling. However, changes in how you look can deeply affect quality of life and self-esteem.
What is a JAK inhibitor?
A JAK inhibitor is a pill that calms the overactive immune system. This may allow your hair to regrow. The FDA has approved three JAK inhibitors to treat alopecia areata.
Does alopecia universalis affect the nails?
Yes. Some people have pits or tiny dents on the surface of the nails, brittle nails, or crumbling nails.
Sources
- American Academy of Dermatology - JAK inhibitors: What your dermatologist wants you to know
- American Academy of Dermatology - Hair loss types: Alopecia areata diagnosis and treatment
- U.S. Food and Drug Administration - Drug Trials Snapshots: LEQSELVI
- MedlinePlus Genetics - Alopecia areata
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
