Red dots on the skin can have various causes, some of which resolve on their own, while others need treatment. Common causes include allergic reactions, acne scars, vascular birthmarks, angiomas, heat rash, insect bites, leaking capillaries, and autoimmune conditions,Allergic Reactions: Redness from allergies to food, substances,
medications, or insect bites.Petechiae and Purpura: Tiny red dots caused by damaged blood vessels, often from stress, coughing, or medication. They can indicate platelet disorders.Cherry Angiomas: Small, raised red bumps from blood vessel overgrowth, typically harmless and common in older adults.Heat Rash: Caused by sweat trapped in ducts, leading to itchy, red spots.