What causes redness, swelling, itching, and pain in the palm?

Redness, swelling, itching, and pain in the palms may be caused by various factors, mainly including skin problems such as allergies, urticaria, dyshidrotic eczema, eczema, and tinea manuum (hand fungus). 1. **Allergy**: Prolonged contact of the palms with allergens such as pollen, dust mites, or animal dander may trigger an allergic reaction, leading to redness, swelling, itching, and pain. 2. **Urticaria**: Urticaria may be triggered by various factors including allergies, immune responses, and environmental influences. When the skin or mucous membranes of the palm are stimulated, small blood vessels become congested and swollen, resulting in localized redness, swelling, itching, and pain. 3. **Dyshidrotic eczema**: This condition may be associated with contact with metallic nickel, fungal infections, or other factors. Patients may experience redness, swelling, itching, and pain on the palm skin, sometimes accompanied by blisters. 4. **Eczema**: Factors such as humid environments and poor immunity may lead to eczema, causing ulcer-like changes in the skin of the palm, accompanied by redness and itching. 5. **Tinea manuum**: A fungal infection of the hand's skin causes tinea manuum. Affected areas may exhibit redness, swelling, itching, and blister formation.