Some people think they have sensitive skin because they begin to get skin irritation due to harsh product. I'd like to caution you it may be the products you're using that's causing this irritation. Just something to consider especially if the products you're using contain chemicals in the ingredients. Go through your products and see if they contain any of the ingredients listed below, if so, we'd really suggest not using them.
Mineral Oil & Petrolatum : pore-clogging and suffocating to the skin
SD Alcohol 40 and Denatured Alcohol : the solvent alcohols commonly found in toners. They are extremely drying and irritating to the skin.
Synthetic dyes : can be a skin irritant
Synthetic fragrances : the #1 cause of allergic reactions to products. Avoid products containing the word "fragrance" or "parfum" on the ingredient listing unless it specifically states what the fragrance is.
Sodium or Ammonium Laureth/Lauryl Sulfate : extremely drying and irritating to the skin
Apricot kernels, or seed/shell powders : naturally made particles found in facial scrubs can scratch and irritate the skin causing bacteria to spread
Imidazolidinyl Urea and Diazolidinyl Urea : These are the most commonly used preservatives after the parabens. They are well established as a primary cause of contact dermatitis (American Academy of Dermatology). Two trade names for these chemicals are Germall II and Germall 115. Neither of the Germall chemicals have a good antifungal, and must be combined with other preservatives. Germall 115 releases formaldehyde at just over 10°. These chemicals are toxic.
Methyl and Propyl and Butyl and Ethyl Paraben : Used as inhibitors of microbial growth and to extend shelf life of products. Widely used even though they are known to be toxic. Have caused many allergic reactions and skin rashes. Methyl paraben combines benzoic acid with the methyl group of chemicals. Highly toxic.
Petrolatum: Petrolatum is mineral oil jelly, and mineral oil causes a lot of problems when used on the skin photosensitivity (i.e., promotes sun damage), and it tends to interfere with the body's own natural moisturizing mechanism, leading to dry skin and chapping. You are being sold a product that creates the very conditions it claims to alleviate. Manufacturers use petrolatum because it is unbelievably cheap.
Propylene Glycol : Ideally this is a vegetable glycerin mixed with grain alcohol, both of which are natural. Usually it is a synthetic petrochemical mix used as a humectant. Has been known to cause allergic and toxic reactions.
Sodium Lauryl Sulfate : This synthetic substance is used in shampoos for its detergent and foam-building abilities. It causes eye irritations, skin rashes, hair loss, scalp scurf similar to dandruff, and allergic reactions. It is frequently disguised in pseudo-natural cosmetics with the parenthetic explanation "comes from coconut."