Porphyria: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Porphyria?
A hematologist, a doctor who treats blood disorders, often leads care for porphyria. A dermatologist (a skin doctor) or a hepatologist (a liver doctor) may also help, depending on the type. 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 porphyria?
Porphyrias are rare disorders. They mainly affect the skin or the nervous system, which is the brain and nerves. They are usually inherited, which means gene changes are passed from parents to children. Your body makes a substance called heme. Heme carries oxygen in your blood.
In porphyria, cells cannot turn some chemicals into heme. The chemicals build up and cause illness. Experts often divide porphyrias into two groups. Acute porphyrias mainly affect the nervous system. Cutaneous porphyrias mainly affect the skin.
Symptoms
Acute porphyria causes attacks. The symptoms come and go. An attack can bring belly pain, vomiting, and constipation. A person may also have muscle weakness, fever, anxiety, and hallucinations. Hallucinations mean seeing or hearing things that are not there. Urine can look dark or reddish-brown. Attacks develop over hours or days. They can last for days or weeks.
Cutaneous porphyrias affect skin that is exposed to sunlight. The skin may blister, become fragile, heal slowly, scar, or change color. Some types, called protoporphyrias, usually do not cause blisters. Instead, sunlit skin may hurt, burn, sting, tingle, redden, or swell.
Causes and who gets it
Most types of porphyria are caused by gene mutations, which are changes in a gene. Many people with the gene changes for acute porphyria never become ill. Certain triggers can cause an attack. These include some medicines, smoking, drinking alcohol, infections, stress, and sun exposure. Dieting and going without food can also be triggers.
Studies suggest that all types of porphyria together affect fewer than 200,000 people in the United States. Acute porphyria is more common in females than in males. It often begins between the ages of 15 and 45. Overall, porphyria cutanea tarda is the most common type.
How doctors diagnose it
Porphyria can be hard to diagnose. Your doctor will ask about your medical history and symptoms and do a physical exam. Blood, urine, and stool tests are needed. They measure porphyrins, the chemicals that build up in porphyria. More testing may be needed to find out which type you have.
Genetic tests check for the gene changes that cause porphyria. They may help confirm the diagnosis. If you have a gene change, your doctor may suggest testing family members for the same change. Genetic counseling can help you and your family understand what test results mean for your lives.
Treatment
Treatment depends on the type of porphyria you have and how severe your symptoms are. Treatment may involve avoiding triggers, receiving heme through a vein, taking medicines to relieve symptoms, or having blood drawn to reduce iron in the body.
Doctors most often treat acute porphyria attacks in a hospital. To help prevent attacks, doctors may suggest these steps:
- Talk with your doctor before you take any over-the-counter or prescription medicines. Some medicines are unsafe for people with porphyria.
- Eat a balanced diet and avoid fasting or extreme diets.
- Do not smoke, and avoid heavy alcohol use.
A liver transplant is only an option for repeated, severe attacks when other treatments do not work. With any cutaneous porphyria, your doctor will recommend steps to protect your skin from sunlight. For erythropoietic protoporphyria, one type, doctors may prescribe a medicine that lets people spend more time in sunlight without pain.
When to see a doctor
See a doctor if your skin blisters, itches, or swells in the sun. Do not wait if you think you are having an acute attack. Without early treatment, symptoms of an attack may become more severe and even life-threatening. These symptoms can be life-threatening, especially if the muscles that control breathing become paralyzed.
Call 911 or go to the emergency room if you think you are having an acute attack. Warning signs are trouble breathing, new muscle weakness, severe belly pain, a seizure, or sudden confusion.
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. Either kind of doctor can start an evaluation, review your medicines with you, and help you reach the right specialist.
Common questions
Is porphyria inherited?
Usually, yes. Porphyrias are usually inherited, which means gene changes are passed from parents to children. Porphyria cutanea tarda is an exception, because most people with this type do not have an inherited gene change.
What can trigger a porphyria attack?
Some medicines, smoking, drinking alcohol, infections, stress, and sun exposure can trigger an attack. Female sex hormones and eating fewer carbohydrates can also make attacks more likely.
Is porphyria life threatening?
It can be, in the acute types. Without early treatment, symptoms of an attack may become more severe and even life-threatening. Most people with acute porphyria have only one or a few attacks in their lives.
Does porphyria always affect the skin?
No. Porphyrias mainly affect either the skin or the nervous system. Four types of acute porphyria affect the nervous system, and two of them can also affect the skin.
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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.
