An itchy head is certainly not new to anyone. According to consumer surveys, more than two-thirds of people have had an itchy scalp. For the head itch, we often do not care too much, only itchy scratch, really can not be hard to scratch. I believe many friends will have this experience, that is, the more you scratch the more itchy, especially or after scratching especially hard with nails, although a few seconds of relief, but after more powerful. I hate to hit the wall with my head to relieve. You have to say that a few days without washing, head itch is understandable, but sometimes it is clear that just washed hair, but still feel very uncomfortable always want to scratch. This is especially true during the change of season. Why is this? Why does the scalp itch? As the most important command and control center of the human body – the natural barrier of the head, the scalp is second only to the eyelids in terms of vulnerability and sensitivity, and can be said to be involved in a hair to move the whole body. Often, a naturally occurring microorganism on the scalp breaks down scalp oils to form an irritant called oleic acid, which can lead to an itchy scalp. If your body is sensitive to oleic acid, you will have an itchy scalp (and also dandruff). 1. Born with a sensitive scalp As mentioned before, the scalp is second only to the eyelids in terms of vulnerability and sensitivity. Some external stimuli, such as weather changes, wind, dust, touch or hair problems can lead to an itchy scalp, but this itch is generally an acceptable range. 2, hair follicle damage Sometimes perm hair dyeing, staying up late, irritating food can be very irritating to the hair follicles, even leading to hair follicle damage, hair loss, which will also feel very itchy at this time. 3, fungal infection The scalp is infected by fungus such as (Malassezia), or the scalp is stimulated because it is not clean, the scalp oil imbalance, resulting in scalp fungal overgrowth, damage to the natural barrier of the scalp – the stratum corneum, which produces dandruff, dandruff stimulates the scalp to produce a local inflammatory response, head itch comes immediately. 4, mental tension Affected by emotional distress can also cause itchy scalp, to lift anxiety. Itchy scalp should also cause attention, life to strengthen care, maintain a happy mood, use such as b2v such as anti-itch effect of shampoo prevention and relief. If the itching is severe, you are advised to go to a professional regular hospital for examination to identify the cause of scalp itching and then treat it symptomatically.