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Scabies: Causes, Symptoms, and Treatment

November 27, 2024

What is Scabies?

Scabies is a highly contagious skin condition caused by the infestation of a tiny parasite known as Sarcoptes scabiei. This mite burrows into the skin, leading to various uncomfortable symptoms.

Symptoms of Scabies

The primary symptom of scabies is intense itching, especially at night when the parasites are most active. Additionally, affected individuals may notice a pimple-like rash that can appear anywhere on the body, often on areas such as the hands, wrists, and between fingers. This rash can become quite irritating and lead to secondary infections if not treated promptly.

Treatment and Prevention

Addressing a scabies infestation typically involves prescription topical treatments that kill the mites and alleviate symptoms. It is crucial for affected individuals to apply the medication as directed and wash clothing and bedding to prevent re-infestation. Preventive measures include avoiding close contact with infected individuals and maintaining good personal hygiene.


Scabies is a highly contagious skin infestation caused by the parasitic mite Sarcoptes scabiei. It is characterized by intense itching, especially at night, and a pimple-like skin rash.

Types of Scabies:

  1. Common Scabies: The most common type of scabies, characterized by intense itching and a pimple-like skin rash.
  2. Norwegian Scabies: A more severe type of scabies, characterized by a thick, crusty skin rash and intense itching.
  3. Scabies in Infants: Scabies in infants is characterized by a rash on the palms of the hands and soles of the feet, as well as intense itching.

Causes and Risk Factors:

  1. Direct Skin-to-Skin Contact: Scabies is typically spread through direct skin-to-skin contact with an infected person.
  2. Indirect Contact: Scabies can also be spread through indirect contact with contaminated objects, such as bedding or clothing.
  3. Poor Hygiene: Poor hygiene, such as not washing hands regularly, can increase the risk of getting scabies.
  4. Weakened Immune System: People with weakened immune systems, such as those with HIV/AIDS or taking immunosuppressive medications, are more susceptible to scabies.
  5. Overcrowding: Overcrowding, such as in refugee camps or homeless shelters, can increase the risk of getting scabies.

Symptoms:

  1. Intense Itching: Intense itching, especially at night, is a hallmark symptom of scabies.
  2. Pimple-Like Skin Rash: A pimple-like skin rash, often accompanied by small blisters or bumps, is a common symptom of scabies.
  3. Skin Lesions: Skin lesions, such as nodules or burrows, can occur in some cases of scabies.
  4. Fever: A low-grade fever can occur in some cases of scabies.

Diagnosis:

  1. Physical Examination: A physical examination of the skin to look for signs of scabies.
  2. Skin Scraping: A skin scraping test to collect skin cells and mites for examination under a microscope.
  3. Microscopic Examination: A microscopic examination of the skin scraping to confirm the presence of scabies mites.

Treatment:

  1. Topical Permethrin: Topical permethrin cream or lotion is a common treatment for scabies.
  2. Oral Ivermectin: Oral ivermectin is an alternative treatment for scabies, especially in cases where topical permethrin is not effective.
  3. Lindane Shampoo: Lindane shampoo is a treatment for scabies, especially in cases where the scalp is affected.
  4. Antihistamines: Antihistamines, such as diphenhydramine, can be used to relieve itching and reduce the risk of scratching the skin.

Prevention:

  1. Practice Good Hygiene: Practice good hygiene, such as washing hands regularly and avoiding sharing personal items.
  2. Avoid Direct Contact: Avoid direct contact with people who have scabies.
  3. Wash and Dry Clothing and Bedding: Wash and dry clothing and bedding in hot water and high heat to kill scabies mites.
  4. Use a Scabies-Killing Laundry Detergent: Use a laundry detergent that is specifically designed to kill scabies mites.