The kitten is always humming and running around. It may be caused by playing, attracting your attention, or being unwell. First, check whether there is any abnormality in the kitten's body. If the kitten is mentally ill, If the kitten has poor appetite, poor appetite, etc., it is best to send it to the pet hospital for examination to avoid delaying the condition; if the kitten has no abnormality and is very lively, then there is no need to worry.