Whenever I get my blood pressure done my self harm scars start stinging very badly The pain is unbelievable My scars also turn purple-ish?
The blood pressure machine may be restricting blood pressure too much.
Stinging cells are called nematocysts. Anything that helps a predator to catch and kill prey is going to be effective. Nematocysts respond to touch, and act like tiny bow-and-arrow traps. Whenever the prey is touched by a tentacle, the nematocyst fires its stinging dart, and poison is shot into the prey. The prey gets more and more tangled up in tentacles, and eventually has so much poison that it dies. Then the jelly or anemone…
Stinging and pressure is usually from the head resting low on the cervix, pelvis, and pubic bone. Signs of labor are steady contractions--most feel like a back ache at first or period cramps that flow up your abdomen. I was concerned about this as well because I experience the same, and cannot sleep due to it. It makes pregnancy miserable but it doesn't mark that it's on it's way to ending.
They use stinging cells, the stinging cells use there sharp spines and when the stinging cell touches prey the thread like structure explodes out of the cell and into the prey. Some stinging cells also release venom into the prey. When the prey becomes helpless, the polyp and medusa use there tentacles to pull the prey into there mouth