The improvement time of HFMD takes about 7 days to 1 month, which is generally related to the severity of the disease as well as the individual’s physical condition, etc., and needs to be analyzed specifically. 1. Mild HFMD: Generally, mild HFMD can be relieved in 7 to 10 days after active treatment, and clinical symptoms disappear. The specific time is related to the severity of the disease, personal constitution and care measures. 2. Severe HFMD: Severe HFMD is prone to induce complications such as meningitis and encephalitis, which will lead to a longer treatment time, and the specific need to be judged according to the severity of the complications, it will take about 1 month, and the specific time has some individual differences. In addition, the discovery of hand, foot and mouth disease must actively seek medical attention, if the condition is serious, for the patient’s health impact is relatively large, timely medical treatment to avoid delaying the condition.