What are the symptoms of leprosy?

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Last updated: February 26, 2025View editorial policy

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From the Guidelines

Leprosy symptoms include pale or reddish skin patches with reduced sensation, numbness in hands and feet, muscle weakness, thickened nerves, painless ulcers on hands and feet, eye problems, and nasal congestion. According to the Centers for Disease Control and Prevention 1, Hansen Disease (Leprosy) has a clinical description that highlights these symptoms. The disease is caused by Mycobacterium leprae bacteria and develops slowly, often taking 3-5 years for symptoms to appear after infection.

Key Symptoms

  • Pale or reddish skin patches with reduced sensation
  • Numbness in hands and feet
  • Muscle weakness
  • Thickened nerves
  • Painless ulcers on hands and feet
  • Eye problems
  • Nasal congestion Early symptoms typically begin with skin lesions that have decreased sensation to touch, temperature, or pain. As the disease progresses, nerve damage can lead to muscle weakness, particularly in the hands and feet, causing deformities if left untreated.

Disease Progression and Treatment

The disease is contagious but not highly infectious, requiring prolonged close contact with untreated patients for transmission. Treatment involves multidrug therapy (MDT) with dapsone, rifampicin, and clofazimine for 6-12 months depending on the type of leprosy. Early diagnosis and treatment are crucial to prevent permanent nerve damage and disability, as highlighted in the case definitions for infectious conditions under public health surveillance by the Centers for Disease Control and Prevention 1.

From the Research

Symptoms of Leprosy

The symptoms of leprosy are not explicitly stated in the provided studies, but we can infer some information about the disease's clinical features from the following points:

  • Leprosy is a chronic infectious disease caused by Mycobacterium (M.) leprae that primarily affects the skin and peripheral nervous system 2.
  • The disease course is determined by individual host immunity, and clinically, multibacillary lepromatous variants are distinguished from paucibacillary tuberculoid forms 2.
  • The condition is marked by damage to the peripheral nervous system, and advanced disease is characterized by disfiguring mutilations 2.
  • Some key characteristics of leprosy include:
    • Various characteristic skin lesions
    • Damage to the peripheral nervous system
    • Disfiguring mutilations in advanced disease
    • Leprosy reactions during therapy that may aggravate the disease course 2 It is essential to note that the provided studies focus on the treatment and management of leprosy rather than its symptoms. Therefore, the information available is limited, and further research may be necessary to provide a comprehensive understanding of the symptoms of leprosy.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Leprosy - an overview of clinical features, diagnosis, and treatment.

Journal der Deutschen Dermatologischen Gesellschaft = Journal of the German Society of Dermatology : JDDG, 2017

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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