Heat rash occurs when sweat ducts become blocked, trapping sweat under the skin. It commonly appears as small red bumps in hot, humid weather—especially on the neck, chest, back, or skin folds.
5. Folliculitis
This condition happens when hair follicles become inflamed or infected. It often looks like small red dots or pimples and may be caused by shaving, friction, bacteria, or tight clothing.
6. Contact Dermatitis
Skin contact with irritants like soap, cleaning products, metals, or plants can cause red dots, itching, and irritation. The rash usually appears exactly where the skin touched the irritant.
7. Eczema (Atopic Dermatitis)
Eczema can cause red, inflamed patches or small bumps, often accompanied by dryness and itching. It may flare due to stress, allergens, weather changes, or certain foods.
8. Psoriasis
Psoriasis is a chronic autoimmune condition that speeds up skin cell turnover. It often appears as red patches with silvery scales, but early stages can present as small red dots.
9. Fungal Infections
Fungal infections like ringworm or yeast can start as red dots before expanding into itchy, scaly patches. Warm, moist areas of the body are most commonly affected.