23-valent pneumonia is 23-valent pneumococcal polysaccharide vaccine. Fever after vaccination with 23-valent pneumococcal polysaccharide vaccine can be treated by general treatment, physical cooling and medication, and timely medical treatment. Most of the fever caused by vaccination is due to immune response, which is a normal physiological phenomenon and will disappear naturally after 2~3 days. 1. General treatment: During the period of fever, you need to drink more warm water, which can promote the metabolism and help reduce fever, ensure sufficient sleep and rest, avoid staying up late and overwork. 2. Physical cooling and medication: if the temperature is below 38.5℃, you can use warm water to wipe the forehead, armpits, groin and other capillary-rich areas; if the temperature is more than 38.5℃, you can take ibuprofen and other medications orally under the guidance of the doctor. 3. Timely medical treatment: If the fever is still recurring after general treatment, physical cooling and medication, or accompanied by some clinical symptoms, it is necessary to go to the hospital for examination. Patients with persistent fever symptoms do not ease, should go to the hospital in time, by the physician according to the condition of the treatment, they can not randomly use drugs.