Why does scar itch?

When a person is injured, operated or scalded or burned-the wound begins to heal-the scar appears-the pain will be obviously relieved-but the itching will follow-especially when sweating or the weather changes.

scar formation

Scar is the trace left by the growth of a sore or wound, such as scar, scar, etc. , white or pale white, smooth and solid. Why does scar itch? This should start with the formation of scars. About 2-3 weeks after scarring, the scar began to proliferate, with local redness, purple, deterioration and protruding from the skin surface, and the new nerve endings were chaotic.

The influence of external factors

Because the scar tissue in the proliferative phase is very sensitive to the physical and chemical factors of the surrounding environment, there will be painful and itchy reactions when the outside world changes, especially itching. Especially when sweating heavily or the weather changes, itching often reaches the point where you have to scratch the scar epidermis to see blood.

The influence of sweating

Why does scar itch when sweating a lot? This is because sweat is composed of water, sodium oxide, potassium chloride, protein and urea. When sweating, the scar is soaked by sweat, and those compounds in sweat will stimulate the sensitive nerve endings in the scar, resulting in a painful and itchy feeling.

The influence of weather change

When the weather changes suddenly, because the temperature difference between hot and cold and the change of dryness and wetness are much stronger than usual, nerve endings in scars can sensitively detect this change and tell people with itchy and painful signals. This is why a healed wound itches for a while.

Time is the best doctor.

Therefore, patients don't have to worry about it, because "time is the best doctor" for itching. With the passage of time, the scar will gradually shrink, degenerate and soften, and the itching will be reduced and disappeared accordingly.