What causes red, itchy spots on the body?

Red, itchy spots on the body may be caused by various factors, including: 1. Dry skin: Environmental dryness or insufficient water intake may lead to dehydration, causing dry skin and subsequent itching and red spots. 2. Poor hygiene: Not showering or changing clothes for extended periods may result in repeated irritation of the skin by sweat and dirt, leading to a weakened skin protective barrier and the appearance of red spots accompanied by itching. 3. Allergic reactions: Contact with allergens such as pollen, willow fluff, or animal dander, or an allergy to clothing materials or body lotions, may trigger allergic skin reactions, manifesting as redness, swelling, itching, and red spots. 4. Insect bites: After being bitten by mosquitoes, mites, or other insects, an allergic reaction to the insect's secretions may cause localized redness, swelling, or small red spots accompanied by significant itching. 5. Skin diseases: Conditions such as eczema, urticaria, and folliculitis may also lead to red spots accompanied by itching. These skin conditions are typically caused by multiple factors, such as humid or hot environments and infections. 6. Fungal infection: Fungal infections such as tinea corporis (ringworm) may also cause red spots accompanied by itching, and the affected areas may be relatively large.