01 / COMMON CONTEXTPattern before product.
The face is commonly affected because it receives more products and exposure, but hands, eyelids, neck and other thin or frequently washed areas can react too.
Fragrance, essential oils, harsh cleansers, multiple new actives, weather changes, friction and preservatives can matter, but individual triggers vary.
02 / ROUTINE FOUNDATIONKeep the base calm.
Use a short ingredient list, fragrance-free cleanser and one moisturiser at a time. Introduce new products gradually and record the timing and location of reactions.
03 / FORMULA DIRECTIONChoose by function.
Glycerin, petrolatum, dimethicone and ceramides are common starting points. Formula simplicity and absence of a personal trigger are more important than a universal sensitive-skin ingredient list.