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Heat Rash
Simple and fairly common depending on the environment. The ‘rash’ occurs when sweat becomes trapped in sweat ducts, producing a pattern of itchy, red dots on the skin.

Allergic Reactions
Self-explanatory. A result of an allergic reaction to food, substances, medications, or insect stings or bites, leading to skin redness and an itchy rash.

Folliculitis
An inflammation of hair follicles usually triggered by bacterial or fungal infections. The result is red, pus-filled dots that can cause discomfort.

Cellulitis
A bacterial skin infection that produces redness and skin swelling that feels warm to the touch. Cellulitis often requires medical attention and treatment via a course of antibiotics.

Impetigo
A contagious bacterial infection that is often easily spread between children. Impetigo is characterized by red sores that open, ooze fluid, and later form a crust.

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Vasculitis
A condition involving inflammation of blood vessels. Vasculitis causes red dots to appear on the skin and can be linked to autoimmune disorders or infections.

Hemangiomas
These are birthmarks resulting from the abnormal growth of blood vessels. Occasional medical intervention may be needed, though they are generally harmless.

In conclusion, the appearance of red dots on the skin doesn’t necessarily signify anything to worry about. That said, it’s important to seek medical advice/attention if:

Red dot