The blanching skin test is used to determine if a rash or discoloration disappears when pressure is applied, which may be a sign of another illness.

You see a two-year-old child with a widespread blanching erythematous macular rash which appeared the previous day. The background is that he saw a locum five days previously with a fever, sore throat ...

The classic erythema ab igne symptom is a rash that resembles a fishnet or “lace-like” pattern. It may start as pink and eventually turn red, purple or brown. It may itch, burn or tingle.

Erythema marginatum in rheumatic fever is a skin rash that appears on the trunk and the upper parts of the arms and legs. Symptoms include non-itchy, painless, discolored spots.

Erythema toxicum neonatorum (ETN) is a harmless and common rash that affects newborns. It appears as a collection of small, yellowish bumps surrounded by inflamed skin. It can look similar to acne.