Barbers should be aware of the various scalp diseases that can affect their clients. Common scalp diseases include:
1. Dandruff: This is a common condition characterized by the shedding of dead skin cells from the scalp. It can be caused by dry skin, an oily scalp, a fungal infection, or sensitivity to hair care products.
2. Psoriasis: Psoriasis is a chronic autoimmune disease that affects the skin, including the scalp. Skin cells multiply rapidly, causing thick, scaly patches. These spots can be itchy, red, and sometimes painful.

3. Seborrheic dermatitis: This is a common inflammatory skin disease that affects areas rich in oil glands, including the scalp. It causes redness, itching, and peeling of the skin. Seborrheic dermatitis is often accompanied by dandruff.

4. Alopecia Areata: This is an autoimmune disease that causes patchy hair loss. It occurs when the immune system mistakenly attacks the hair follicles, causing hair loss on the scalp and other parts of the body.

5. Tinea capitis: Tinea capitis, also known as tinea capitis, is a fungal infection that affects the scalp. It can cause hair loss, redness, itching, and the formation of scaly spots and blisters.

6. Folliculitis: Folliculitis is an inflammation of the hair follicles, usually caused by a bacterial or fungal infection. Red, swollen, pus-filled bumps may appear on the scalp.

7. Head lice: Although not a disease, head lice infestations are a common problem, especially among children. It causes severe itching and the presence of small insects and their eggs (larvae) on the scalp.

Barbers have knowledge about these scalp diseases in order to identify them early, provide appropriate advice to their clients, and refer them to dermatologists and general practitioners if necessary. There is a need.