Which condition is also known as prickly heat and involves small red vesicles?

Miliaria rubra, commonly referred to as prickly heat, is characterized by small red vesicles that appear on the skin. This condition occurs when sweat glands become blocked, leading to inflammation and the formation of these tiny, red, fluid-filled blisters. The vesicles are often accompanied by discomfort and itching, especially during hot and humid weather when sweating is increased.

Understanding the symptoms and causative factors of miliaria rubra helps distinguish it from other skin conditions. For instance, leukoderma refers to patches of skin that are lighter than the surrounding area, often due to loss of pigment, and does not involve vesicles or redness. Lentigines are flat brown spots that arise from sun exposure and aging, and milia are small, white cysts that appear on the skin, typically associated with newborns but can occur in anyone. Each of these conditions has distinct characteristics and causes, setting them apart from miliaria rubra and its presentation of small red vesicles.