How your skin works | SESH Academy
Learn the mechanism and apply it to a practical routine.
Science made simple
The epidermis is the outer tissue where skincare is applied. Its upper stratum corneum contains cells and organized lipids that limit water loss and irritant entry. The dermis beneath holds vessels, nerves and collagen. A cosmetic need not reach every layer to have a useful effect.
Skin anatomy: the epidermis sits above the dermis, with follicles and glands at different depths. Location explains a skincare target; it does not prove that a product reaches every layer.
What changes the result
Sebum produced by glands is different from water held in the skin. A shiny forehead can coexist with tightness after cleansing. Describe the observation and when it happens instead of assuming all oily skin needs no moisturizer.
Apply it to a real routine
Start with three functions: suitable cleansing, appropriate moisturizing and UV protection. Add a targeted serum only for a defined concern. Stinging or peeling is not a success measure; persistent painful symptoms deserve assessment.
How the barrier maintains balance
Think of the stratum corneum as compact cells surrounded by organized intercellular lipids. This arrangement reduces transepidermal water loss (TEWL). Overly aggressive cleansing can disturb comfort even when sebum production is high. Surface shine therefore tells you little about overall barrier condition.
Find the stratum corneum at the top and cell renewal below. This is thick skin, such as a palm; its clear lucidum layer is absent from facial skin.
Apply the idea to each routine step
For shiny skin with mild breakouts, cleansing should remove residue without stripping. A moisturizer supports surface comfort, while sunscreen reduces UV exposure. Only add a serum for a specific unmet goal. A product labeled 'anti-ageing' is not automatically a beginner essential.
Explore the complete SESH Skincare Academy to study each topic and test your understanding.
