White patches on forehead may be related to vitiligo, white furfur, localized lichen planus and other causes.
1. Vitiligo: genetic factors, external trauma, excessive pressure and other factors can cause local skin melanocytes to be destroyed, thus triggering vitiligo, the main symptoms of certain areas of the body white spots, hair white, etc., so the forehead long white patches may be caused by vitiligo.
2. white chaff rash: malnutrition, skin care is not in place, wind and sun exposure can lead to mild inflammation of the exposed skin, destroying the formation of melanin, epidermal white patches and other symptoms, so white patches on the forehead, may also be caused by white chaff rash.
3. localized lichen planus: lichen planus is caused by fungal infection, fungi into the human body will secrete some substances, will have an inhibitory effect on the formation of melanin, which will make the local skin pigmentation loss, white patches.
White patches on the forehead may also be associated with post-inflammatory depigmentation, psoriasis, etc. Patients need to consult a doctor for examination in a timely manner, and follow the doctor’s instructions for treatment according to the actual situation.