Matchbox sign

Matchbox sign is a term used in dermatology to describe a specific symptom of scabies, a skin condition caused by the parasite Sarcoptes scabiei. The term refers to the appearance of skin scrapings from a patient with scabies when they are placed on a black background. The scrapings, which contain mites, eggs, and feces, resemble the grayish-white debris found in a used matchbox.

Overview

Scabies is a contagious skin disease that is caused by the parasite Sarcoptes scabiei. The mites burrow into the skin, causing intense itching and a pimple-like rash. The matchbox sign is a characteristic feature of scabies and is used by healthcare professionals to help diagnose the condition.

Diagnosis

The matchbox sign is a diagnostic tool used in the identification of scabies. The healthcare professional will scrape off a small sample of skin from the patient and place it on a black background. The skin scrapings, which contain mites, eggs, and feces, will resemble the grayish-white debris found in a used matchbox. This is considered a positive matchbox sign and is indicative of scabies.

Treatment

Treatment for scabies typically involves medications that kill scabies mites and their eggs. These are called scabicides. In most cases, you'll need to apply the medication all over your body, from your neck down, and leave the medication on for at least eight to 10 hours. Some treatments require a second application, and treatments need to be repeated if new burrows and rashes appear.

Prevention

Prevention of scabies infestation primarily involves avoiding direct skin-to-skin contact with an infested person. Treatment of household members and sexual partners of people diagnosed with scabies may be necessary to avoid re-infestation.

See also

• Scabies
• Dermatology
• Parasite
• Sarcoptes scabiei