Itchy red dots in late pregnancy may be caused by urticaria, papular urticaria and eczema, which need to be analyzed according to the symptoms. 1. Urticaria: due to contact with a sensitizing substance such as food, dust, etc., the skin mucosa due to a temporary increase in vascular permeability and the occurrence of confined edema, the patient is often suddenly self-conscious of skin itching, and soon appeared in the itchy parts of the red red masses of varying sizes, in a round, oval or irregular shape. 2. Papular urticaria: most of them are caused by bites of bedbugs, mosquitoes, fleas, lice, mites, etc., and a few of them are related to food allergy. Rash to the trunk, limb extensors are common, clustered or scattered. At the beginning of the micro-red papules, and then into mung bean or peanut size slightly fusiform red doughnut-like damage, accompanied by intense itching. 3. Eczema: It is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors. The disease can be triggered or aggravated by food (such as fish, shrimp, beef and lamb, etc.), inhalants (such as pollen, house dust mites, etc.), living environment (such as heat, dryness, etc.), animal fur, a variety of chemicals (such as cosmetics, soap, synthetic fibers, etc.). Small red spots and itching in late pregnancy may have other causes, it is recommended to go to the hospital in time for examination and diagnosis, and standardized treatment under the guidance of the doctor.