This medical meaning refers to a visible change in the skin involving redness, spots, swelling, or itching.
The medicine caused a red rash.
She developed a rash on her arms.
This figurative meaning refers to many similar unwanted events happening within a short time.
The city experienced a rash of car thefts.
A rash of complaints followed the announcement.
This meaning describes behavior or decisions made impulsively without considering risks or consequences.
It would be rash to make a decision now.
His rash actions created more problems.
