Why does a healing wound itch so unbearably?
It actually has nothing to do with infection. The main reason is that your nerves are reconnecting.
Your body starts working on a wound as soon as it appears. First, platelets plug the gap. White blood cells rush in to clean up. Then fibroblasts bring in collagen to build a new scaffold, followed by a dense network of new blood vessels and nerve endings. This team also releases small molecules like histamine and bradykinin, which act as switches for itch-sensing nerves. Put simply, the new tissue is naturally itchy—and that sensation is deliberately amplified to remind you to leave it alone.
Scratching feels great, but it can come at a steep price. Your fingernails can rip away the fresh layer of skin and collagen, leaving the wound exposed for a few extra days and making the scar deeper. The doctor’s advice is simple: apply a cold, damp cloth for a few minutes, or put on a layer of petroleum jelly to block out the air. If the itch is keeping you up at night, ask your doctor whether you should take an antihistamine.
When your body is working somewhere you can’t see, discomfort is the only way it can let you know it cares.
When was the last time you couldn’t resist picking at a scab—and did it leave a scar?
It actually has nothing to do with infection. The main reason is that your nerves are reconnecting.
Your body starts working on a wound as soon as it appears. First, platelets plug the gap. White blood cells rush in to clean up. Then fibroblasts bring in collagen to build a new scaffold, followed by a dense network of new blood vessels and nerve endings. This team also releases small molecules like histamine and bradykinin, which act as switches for itch-sensing nerves. Put simply, the new tissue is naturally itchy—and that sensation is deliberately amplified to remind you to leave it alone.
Scratching feels great, but it can come at a steep price. Your fingernails can rip away the fresh layer of skin and collagen, leaving the wound exposed for a few extra days and making the scar deeper. The doctor’s advice is simple: apply a cold, damp cloth for a few minutes, or put on a layer of petroleum jelly to block out the air. If the itch is keeping you up at night, ask your doctor whether you should take an antihistamine.
When your body is working somewhere you can’t see, discomfort is the only way it can let you know it cares.
When was the last time you couldn’t resist picking at a scab—and did it leave a scar?