Once you eat spicy scalp itch may be caused by seborrheic dermatitis, folliculitis, allergies and other reasons. 1. Seborrheic dermatitis: a chronic inflammatory skin disease. When seborrheic dermatitis occurs in the scalp area, the affected skin can appear red spots, flaking dandruff, scalp hair greasy and so on. Consumption of spicy food will prompt local blood circulation to accelerate, resulting in increased inflammation and itchy scalp. 2. Folliculitis: It is caused by localized hair follicles infected with bacteria. As there are many hair follicles and sebaceous glands distributed in the scalp area, consuming too much spicy food will lead to an increase in the secretion of hair follicles and sebaceous glands, blocking the pores, aggravating the folliculitis, and the appearance of itchy scalp. 3. Allergy: their own belong to the allergic body, a spicy food body to spicy food does not adapt to, spicy food allergies caused by allergic reactions, resulting in the appearance of itchy scalp. Eat spicy scalp itchy and accompanied by other symptoms, should be timely medical diagnosis, daily attention to not eat too spicy stimulating food, do not scratch with your hands to touch the itchy parts.