Skin Types are Genetically Determined
People are born with their skin type, which is determined by their genetics and ethnicity.
Like everything else, skin can change over time. An individual's skin type is based primarily on how much oil is produced in the follicles from the sebaceous glands and on the amount of lipids found between the cells.
The T-zone is the center of the area, corresponding to the "T" shape formed by the forehead, nose, and chin. How large the pores are in the T-zone and throughout the face can help determine the skin type.
Generally, an individual's skin becomes drier over time. Our cellular metabolism and oil/lipid production slow down as we age.
Skin types include dry, normal, combination, and oily. Sensitive skin is sometimes discussed as a skin type, but it is primarily a skin condition.
Acne is considered a disorder. All skin types need proper cleansing, exfoliating, and hydrating. Finding the right care for each individual can be challenging, and this makes our job even more interesting.