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What is a characteristic symptom of scabies?

  1. Redness of the scalp

  2. Excessive itching

  3. Dry scalp

  4. Woolly hair

The correct answer is: Excessive itching

Excessive itching is a hallmark symptom of scabies, which is caused by an infestation of the skin by microscopic mites known as Sarcoptes scabiei. These mites burrow into the upper layer of the skin, leading to intense irritation and inflammation as a result of the body's allergic reaction to the mites and their waste products. This itching is typically more severe at night, making it a significant indicator of the condition. In contrast, redness of the scalp, dry scalp, and woolly hair are not characteristic symptoms of scabies. Redness might occur in various skin conditions or irritations but is not specific to scabies. A dry scalp could be due to other dermatological issues, such as dandruff or eczema, and does not represent a direct symptom of scabies. Woolly hair is not associated with scabies at all and is more related to hair texture or other hair conditions.