Razor burn is most likely to occur on the face or under the arms. It can really happen anywhere you shave already irritated skin. Poor shaving technique will probably result in razor burn. Pressing too hard on the skin which removes tiny layers of skin, can cause the condition.
A sensitive skin is a thin or a fine-textured skin. It reacts quickly to both heat and cold; therefore, it sunburns and windburns easily. It is commonly dry, delicate and prone to allergic reactions. Temperature changes, some detergents, cosmetics and alcohol (used on the skin) can all cause irritation, leaving the skin red and blotchy, with visible surface veins.