A red throat in children is a congested throat. The common causes of children’s throat red are: upper respiratory tract infection, pharyngeal allergic reaction, physical factors stimulation. 1. Upper respiratory tract infection: due to the children’s body immunity is poorer than adults, when infected by pathogens, inflammatory mediators stimulate the pharyngeal area, which in turn causes inflammatory edema of the throat, congestion, resulting in a red throat. 2. Pharyngeal allergic reaction: some children belong to the allergic body, when eating improperly or contact with allergic substances, it is easy to cause an allergic reaction in the throat, resulting in edema of the mucous membrane of the throat, congestion, resulting in redness of the throat. 3. Physical stimulation: some children eat too cold, too hot, spicy stimulating food, will also stimulate the throat, resulting in pharyngeal congestion, edema, resulting in throat redness. In short, children with congestion in the throat need to go to the regular hospital in time, under the judgment of professional doctors timely treatment.