Why does the dry itch on my legs get worse when I scratch it?

Itching on the legs that worsens with scratching is usually caused by dry skin, eczema, allergic dermatitis, or similar conditions. Treatment should be selected based on the specific condition. Detailed analysis is as follows:

1. Dry Skin

Dry skin is typically related to dry weather, which causes loss of moisture from the skin, leading to localized itching and mild flaking. Symptoms generally improve gradually with proper hydration and moisturizing.

2. Eczema

Leg itching may also result from localized eczema, often associated with environmental irritants or allergies. It can cause skin-colored papules or red rashes, accompanied by symptoms such as itching, stinging, and flaking. In such cases, patients should use medications like tacrolimus ointment or desonide cream under a doctor's guidance.

3. Allergic Dermatitis

If an allergen has been contacted recently, it may trigger a local allergic reaction in the skin, manifesting as erythema or red rashes, along with intense itching, swelling, and increased skin temperature. Patients should take antihistamines such as loratadine tablets or chlorpheniramine maleate tablets as directed by a physician.

Besides the common causes mentioned above, other conditions such as psoriasis, tinea corporis, or ichthyosis could also be responsible. Patients should seek timely medical attention to avoid delays in treatment. During treatment, avoid excessive scratching of affected areas.