There is no one cause for the appearance of red spots on the skin; some disappear without therapy, while others need medical intervention. Most often, red patches may be caused by allergic responses, acne scars, vascular birthmarks, angiomas, heat rash, insect bites, leaky capillaries, autoimmune diseases, and protein overproduction. First, the purpura and petechiae When capillaries or blood vessels are injured, they may cause little red spots to form on the skin. Anxiety, coughing, or even certain drugs might bring them on. While often innocuous, they may sometimes signal underlying platelet problems.
