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.

Super easy rash test every parent must know – and you only need your thumb. Most people know that you can check for a rash linked to meningitis with a glass tumbler, ...

A non-blanching rash is where the rash does not fade when pressed with a glass. Livedo reticularis, according to the Mayo Clinic, is a condition that causes the skin to appear mottled and purple ...

By pressing a glass against the rash to see if it fades under pressure, if the rash remains visible through the glass (a non-blanching rash), it's a potential indicator of a serious infection and ...

This involves pressing a glass against the rash to see if it fades under pressure. If the rash remains visible through the glass (a non-blanching rash), it could indicate a serious infection ...

After getting dressed, her mother, Elizabeth, and father noticed another purple rash on her knee. Penelope's aunt, Angel Walsh, 35, told the ECHO how the quick-thinking parents tried 'the glass' test, ...