Why Does the Skin Itch More When Scratched?
Sep 16, 2025
Source: Cainiu Health
Dr. Liu Wenmin
Introduction
In general, the more the skin is scratched, the more it may itch due to causes such as dry skin, mechanical irritation, allergic dermatitis, eczema, or neurodermatitis. It is recommended to seek medical attention promptly, identify the underlying cause, and undergo symptomatic treatment under a doctor's guidance. Daily care should include maintaining skin cleanliness, avoiding frequent use of irritating cleansers, and keeping indoor humidity at an appropriate level.
Generally, the more the skin is scratched, the more it itches, which may be caused by dry skin, mechanical irritation, allergic dermatitis, eczema, neurodermatitis, and other conditions. It is recommended to seek timely medical attention, identify the underlying cause, and undergo symptomatic treatment under a doctor's guidance. Specific explanations are as follows:
1. Dry Skin: Dry climates or frequent bathing can damage the skin barrier, leading to moisture loss. The skin becomes itchy when irritated, and scratching further damages the barrier and worsens the itching. Reduce the frequency of bathing, keep the water temperature at 37-40°C during each bath, and apply moisturizing products promptly after bathing to maintain skin hydration.
2. Mechanical Irritation: Scratching causes friction and pressure from the fingers on the skin, stimulating nerve endings and promoting the release of itch-inducing substances like histamine, which intensifies itching. Avoid scratching with fingernails; instead, relieve itching by gently patting or applying cold compresses. Choose loose, soft cotton clothing to reduce skin friction.
3. Allergic Dermatitis: Skin may develop allergic reactions upon contact with allergens such as pollen, dust mites, or cosmetics, manifesting as itching and red patches. Scratching exacerbates allergic symptoms. Patients should follow medical advice to take antiallergic medications such as Cetirizine Hydrochloride Tablets, Loratadine Capsules, or Ebastine Tablets.
4. Eczema: Related to genetic and immune abnormalities, eczema presents with skin redness, rashes, and itching. Scratching can cause skin damage and infection, worsening the condition. Under medical guidance, patients may use topical anti-inflammatory and antipruritic medications such as Desonide Cream, Mometasone Furoate Cream, or Hydrocortisone Butyrate Cream.
5. Neurodermatitis: Triggered by prolonged mental stress, anxiety, and other factors, neurodermatitis causes intermittent itching. Scratching leads to thickened skin lesions and more intense itching. Patients should follow medical advice to use medications such as Halometasone Cream, Clobetasol Propionate Cream, or Chlorpheniramine Maleate Tablets to relieve symptoms.
In daily life, maintain skin cleanliness and avoid frequent use of irritating cleansers. Keep indoor humidity at an appropriate level to prevent dryness. In terms of diet, reduce intake of spicy and irritating foods, and consume more fresh vegetables and fruits to provide adequate nutrition for the skin and help maintain its health.
