People with sensitive skin may have skin issues like eczema and rosacea. When it comes to sensitive skin, genetics plays a very active part in the danger you experience with sensitive skin. People with red hair and light skin are often prone to having sensitive skin that easily reacts. The reasons why your skin is reacting often might be connected to what is happening at the cellular level. People with sensitive skin types cannot retain moisture, and when there is constant water loss, it leads to dryness and a fast reaction to products.