An itchy forehead can be caused by skin conditions such as eczema, contact dermatitis, seborrheic dermatitis, dandruff and acne. Certain cosmetics and skin care products contain irritating or sensitizing ingredients that can trigger itching due to allergens. Other causes include sunburn, headgear such as hats and bandanas, work-related stress, and systemic diseases. Symptoms can be combined with burning, dryness, redness, scaling, flaking, etc. In most cases, itchy forehead is a reaction of the skin to allergens and inflammation. For example, eczema, contact dermatitis, atopic dermatitis, etc. Contact with allergens causes mast cells to release histamine, causing itching. Seborrheic dermatitis and acne, on the other hand, are inflammation-induced itching. Headgear, irritating skin care products, cosmetics, dirt, etc. are irritants that induce itching, which can be relieved by avoiding them. To summarize, itchy forehead suggests that the skin may have an allergic reaction, inflammation or irritation. Psychological factors and systemic diseases are rare.