T-zone yellowing refers to the forehead, nasal perimeter yellowing, usually related to a variety of factors, as follows: 1, congenital factors: some people are born with yellow skin, especially the T-zone on the convex side of the face, this situation is a physiological cause, does not require special treatment; 2, bad habits: long-term late night, irregular diet, etc. will lead to endocrine disorders, excessive secretion of facial oil, the keratin layer is relatively thick causing facial T-zone yellowing, we need to adjust the bad habits; 3, food pigment impact: some people eat a lot of oranges, oranges and other foods containing high carotene, there is a limited skin yellowing, this situation also does not require special treatment, if you care about skin color changes can reduce the consumption of such foods; 4, liver disease: liver disease caused by jaundice is generally systemic, and will be accompanied by yellowing of the eye sclera, common in Chronic liver disease or liver cancer, if accompanied by digestive difficulties, abdominal discomfort, loss of appetite and other abnormalities, need to promptly seek medical attention; 5, skin disease: mainly seborrheic dermatitis, can be caused by Malassezia and streptococcal infection, but also with genetics, sebum metabolism abnormalities, etc., manifested as a clear-edged dark yellow spots, patches or maculopapular rash in the T-zone area.