Red dots on the skin can result from various factors, including allergic reactions, acne marks, vascular birthmarks, angiomas, heat rash, insect bites, or autoimmune conditions. Petechiae and purpura appear as tiny dots due to damaged blood vessels, while cherry angiomas present as raised red bumps. Heat rash develops when sweat becomes trapped, and infections such as folliculitis or cellulitis can also lead to redness. Other potential causes include impetigo, vasculitis, and hemangiomas. Home remedies like aloe vera gel and coconut oil may provide relief, but if the red dots worsen, it is essential to consult a doctor.