Heat Rash on Face

Sun/Heat Rash

This kind of rash appears mostly in fair skinned individuals. A rash appears as small reddish blisters or small or large spots. The rash appear on areas of the skin that have been exposed to sunlight. It appears immediately or within a few hours, and is extremely itchy. Make use of high SPF sunscreen lotion to prevent such kind of rash.
Prickly Heat Rash

A rash caused by perspiration retention is miliaria, commonly known as prickly heat. Heat and humidity play a vital role in causing prickly heat. The sweat glands become clogged or plugged by prolonged exposure to perspiration; they break open, allowing sweat to escape just below the skin, which causes the rash.
Drug-Induced Photosensitivity Rash

Some medications may make an individual to be sun sensitive. The sun sensitiveness of people due to medication is called as drug-induced photosensitivity. The medicines that cause skin sensitivity are birth control pills, antihistamines, blood pressure medicine, nonsteroidal anti-inflammatory drugs (NSAIDs) and some antibiotics.
Photo Allergic Dermatitis

Such kind of rash appears due to the action of the sun on skin exposed to the chemicals found in cosmetics, perfumes, soaps, topical medications or sun tan lotions.