Dandruff often causes visible flakes on the scalp. Reaction to a hair care product. An itchy, dry, and flaky scalp could be telling you that you need to do a better job of rinsing the shampoo from your hair. Leaving some shampoo on your scalp can irritate it. Seborrheic (seb-o-REE-ik) dermatitis is a common skin condition that mainly affects your scalp. It causes scaly patches, red skin and stubborn dandruff. Seborrheic dermatitis can also affect oily areas of the body, such as the face, sides of the nose, eyebrows, ears, eyelids and chest. Seborrheic dermatitis may go away without treatment.
The scalp can become infected if fungus or bacteria enter the scalp through the hair follicles or damaged skin. Skin damage can result from common skin conditions, such as psoriasis and eczema. Scalp issues are often caused by seborrheic dermatitis. Adults living with this condition may have symptoms come and go throughout their life. It .