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Living with Leprosy

A long-known bacterial infection, also called Hansen disease, that mainly affects the skin and nerves.

Understanding Leprosy

Leprosy, also called Hansen disease, is a contagious infection caused by bacteria called Mycobacterium leprae.

It affects the skin and the peripheral nerves. It is not highly transmissible, and about 95 percent of people who are exposed never develop it. Symptoms can take several months to 20 years to appear, and it can start at any age. It occurs on a spectrum from less severe to more severe forms.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Skin sores and lighter patches (lesions)
  • Nerve damage (peripheral neuropathy)
  • Skin nodules (lumps)
  • Pins and needles feeling (paresthesia)
  • Decreased ability to sweat
  • Muscle wasting

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Resolve: The National Infertility Association and The Foundation for Peripheral Neuropathy may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists)
Expert care
Expert lists: Resolve: The National Infertility Association, The Foundation for Peripheral Neuropathy
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Resolve: The National Infertility Association and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which form of leprosy do I have?
What should family members or close contacts do?
How can I protect my skin and nerves over time?

Quick facts

Symptoms usually startany time in life

It is caused by Mycobacterium leprae bacteria. It is usually caught by breathing in droplets from coughs and sneezes or contact with nasal fluids of someone who has it.

InfectiousNeurological

Also known as: hansen disease; hansen's disease; infection due to mycobacterium leprae; mycobacterium leprae caused disease or disorder; mycobacterium leprae disease or disorder; mycobacterium leprae infection

Patient organizations

Source: NIH GARD · LeprosyGARD ID 6886 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Leprosy.

Explore the Leprosy blog

Explore research for Leprosy

Explore actively recruiting Leprosy studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Leprosy with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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