Immunocompromised people can develop hives. People with low immunity are easily irritated by external factors and develop allergies, and some of them will show hives. Urticaria is an allergic skin disease and can be caused by a variety of factors, including external factors such as medication, food, and physical stimuli, as well as internal factors such as stress, depression, overwork, and infections. Urticaria is not entirely caused by low immunity, but is related to the immune state of the body. Because when the immune system is low, the skin barrier function is reduced, so it is more sensitive to external stimuli, so when it comes into contact with allergens, it is easier to show redness, itching, rash and other allergic symptoms. If urticaria is caused by low immunity, it is recommended to consult a doctor in time after the symptoms appear, under the guidance of the doctor for treatment, and at the same time to improve the body’s immunity.