There is no specific requirement for the time of moxibustion navel, any time can be, so there is no best time to moxibustion navel. Belly button belongs to the Shen Que point, moxibustion Shen Que point has warm Yang rescue (through warming Yang Qi to save fainting, unconsciousness, etc.), diuretics (diuretics, eliminating edema) and other efficacy, clinically used in the treatment of dehydration, menstrual disorders, spermatorrhea, infertility and other diseases. There is no special requirement for the time period of moxibustion, you can flexibly adjust the time according to your own needs. Be careful not to be too hungry or too full during moxibustion, and moxibustion should not last too long, usually lasts 15-30 minutes. Moxibustion needs to be operated by a professional doctor, it is recommended to consult a professional doctor to determine whether you are suitable for moxibustion.