It's a way of saying someone was really worrying about something, as if they were so worried that instead of just sweating, blood was coming out of their pores.
The word sweating is an adjective.
Sweating is "perspiration" (when you sweat, you perspire).
To vomit blood.
blood loss
"SWEATING the halyard" is pronounced as "sweating the HAL-yerd." The emphasis is typically placed on "HAL," and "halyard" is pronounced with two syllables. It refers to the process of tightening or adjusting the halyard, which is a rope used to raise and lower a sail on a boat.
blood pressure temperature
Sweating means you're working hard!
Drinking water and sweating it back out.
Drinking water and sweating it back out.
poped a pill and now sweating
Sweating
Sounds painfull
A blood-sweating horse is a rare condition where horses appear to sweat blood due to ruptured blood vessels underneath their skin. It is thought to be caused by extreme stress or exertion, and the actual sweat does not contain blood. It is a serious condition that requires veterinary attention.
Diaphoresis is a medical term used to refer to perspiration or sweating.
skin
Yeast respiration means vaginal sweating.
Episodes of high blood pressure may be accompanied by symptoms such as headache, sweating, palpitations, and anxiety.