Skin reactions are responses of the skin to various stimuli, which can include allergens, irritants, or infections. Common types of skin reactions include rashes, hives, and eczema. These reactions can manifest as redness, swelling, itching, or blisters, and they may vary in severity depending on the individual and the cause. Factors that can trigger skin reactions include certain foods, medications, insect bites, and environmental elements like pollution or sunlight. Treatment often involves identifying and avoiding the trigger, using topical creams, or taking antihistamines to alleviate symptoms. In some cases, consulting a healthcare professional is necessary for proper diagnosis and management.