What causes small red itchy spots on the body?

Small red spots appear on the body accompanied by a sensation of itching; the following are some common possibilities:

1. Allergic reaction: This could be a manifestation of an allergic reaction, such as to food, medications, pollen, dust mites, etc.

2. Urticaria (hives): This is a very common skin condition that can be caused by food, medications, infections, or environmental factors. The condition is usually accompanied by symptoms such as redness, swelling, itching, and rash.

3. Eczema: Particularly atopic dermatitis, commonly seen in children and adults, characterized by dry skin, redness, and itching. The exact cause of eczema is not fully understood, but it is associated with genetic factors, immune system abnormalities, and impaired skin barrier function.

4. Viral infection: Such as chickenpox, hand-foot-and-mouth disease, etc. These diseases may also be accompanied by symptoms like fever and fatigue, in addition to red spots.

5. Fungal infection: Such as jock itch or ringworm, which typically occur more easily in warm, moist environments. The characteristic feature is round or ring-shaped red patches with clear edges and possibly less intense center.

6. Insect bites: Mosquito bites or certain parasitic infections may also trigger similar reactions.

For such situations, it is recommended to first try avoiding possible allergens, keeping the skin clean and dry, and refraining from scratching. If symptoms persist or worsen, timely medical consultation is advised for diagnosis and treatment by a qualified physician according to the specific condition.