What skin condition is also known as prickly heat?

The term "prickly heat" is commonly associated with miliaria rubra, which is a skin condition that occurs when sweat ducts become blocked, leading to the retention of sweat underneath the skin. This blockage often results in small, red bumps and a sensation of prickling or itching, especially in hot or humid conditions. The appearance of these tiny blisters or papules typically manifests in areas where sweat accumulates, such as on the back, neck, and shoulders, making it uncomfortable.

Understanding this condition helps in identifying that while heat rash and miliaria rubra are closely related, the specific medical terminology refers to miliaria rubra. Heat rash is a general term often used to describe the broader category of conditions that occur due to heat and sweating, but it may not accurately capture the specifics of the inflammatory process involved in miliaria rubra. The other choices such as dermatitis and cholinergic urticaria refer to different skin reactions and conditions not specifically indicated as prickly heat. Thus, miliaria rubra is the precise term that corresponds to the term prickly heat, making it the most accurate answer.