What skin condition is manifested by tiny red spots that do not blanch when pressed?

The presence of tiny red spots that do not blanch when pressed is characteristic of a petechial rash. This type of rash results from tiny blood vessels leaking blood into the skin, which creates the appearance of small red or purple dots. Unlike other rashes, petechiae do not fade or turn white when pressure is applied, which is a key distinction.

In contrast, conditions such as eczema, psoriasis, and dermatitis typically present with different visual characteristics and responses to pressure. Eczema often appears as inflamed patches that may be itchy and can change color when pressed. Psoriasis generally features thick, red patches covered with silvery-white scales, while dermatitis is more varied but usually involves inflammation with possible swelling and changes in skin texture, often with a potential to blanch under pressure. Thus, recognizing the traits of each condition can help in identifying the distinctive nature of a petechial rash.