The red spots on the skin when you are excited are mostly considered to be caused by cholinergic urticaria. Cholinergic urticaria is typically manifested as small, itchy, dotted masses surrounded by varying degrees of redness, and in severe cases may be accompanied by headache, nausea, and diarrhea, and if the patient is overly agitated, his or her skin may develop red spots. There are many causes of cholinergic urticaria, mainly related to the local center of the skin temperature increase, including exercise, stress, hot baths, emotional stress, and eating spicy food. If the skin breaks out in red spots when you are in an agitated mood, cholinergic urticaria may be the cause. If accompanied by headache, tears and diarrhea and other symptoms, you need to go to a regular hospital, with the doctor for standardized treatment.