A scab is a dry, rough protective crust that forms over a cut or wound during healing.

When the clot dries, it turns into a scab.

As scabs heal, they often start to itch.

healing scab on leg

Sinhyu / Getty Images

double-check to avoid scratching themthis can cause further damage to the skin, and the healing process will restart.

Using moisturizer or cooling ointments can help relieve the itch.

Protecting scabs is essential to prevent infection and minimize scarring.

Sinhyu / Getty Images

Why Do Scabs Form?

After an injury to the skin, scab formation promotes wound healing.

The dried-up blood clots can help prevent infections by covering up your injury while it heals.

The platelets release chemical messengers that send signals to bring inflammatory cells to the injury site to initiate healing.

How Long Do Scabs Take to Heal?

Under the scab, new cells are produced to help repair the skin and blood vessels.

Eventually, the scab falls off to reveal a brand-new layer of skin.

However, they can cause discomfort such as itching during the recovery process.

Using a moisturizer or cooling ointment can help relieve the itch.

There are many reasons why a wound might take longer than usual to heal.

National Institute of Arthritis and Musculoskeletal and Skin Diseases.Health lesson: Learning about skin.

Ali RA, Wuescher LM, Worth RG.Platelets: essential components of the immune system.Curr Trends Immunol.

Nemours Children’s Health.Should I pop my pimple?

InformedHealth.org.Overview: Allergic contact dermatitis.

Seattle Children’s.Impetigo - infected sores.

Fred Hutch Cancer Center.Facts about skin cancer.

Cedars-Sinai.Don’t mistake these skin conditions for acne.

Lerner E.Why do wounds itch?Wounds.2018;30(1):13.

Nemours KidsHealth.What are scabs?

American Academy of Dermatology Association.Proper wound care: How to minimize a scar.

Leslie TA.Itch.Medicine.2013:41(7);367-371.

BetterHealth Channel.Wounds - how to care for them.

Hampton S.Wound management 6: how to address wound healing complications.Nursing Times.201;111(51/52):2225.