If the body occasionally fever, there are usually the following factors: 1, if the occasional fever when the temperature is not high, usually persist in the body temperature within 38 ℃ problem is not big, usually because the body’s sympathetic nerves overexcited and lead to emotional excitement, causing an increase in body temperature. 2, if the occasional fever but increased body temperature, heat type in 39 ℃ or more, you need to go to the hospital to identify the blood routine and C-reactive protein most common The most common factor is bacterial infection, the body’s relatively strong immune system will quickly expel the pathogens out of the body, the body temperature will appear a transient drop, such as the infection of pathogenic bacteria inflammation is more serious, will not completely expel toxins out of the body, will repeatedly cause fever. 3, endocrine diseases, such as hyperthyroidism, etc., will also appear in the body occasionally fever.