Sensitive skin refers to a condition in which the skin is more easily irritated or reacts more strongly than normal skin to various stimuli, such as temperature changes, harsh chemicals, and even friction. People with sensitive skin may experience redness, itching, stinging, or inflammation when exposed to these triggers. The exact cause of sensitive skin is not well understood, but it can be influenced by genetics, environmental factors, and underlying medical conditions such as rosacea or eczema.