MOST people do not “sleep-fart” very often, simply because the body relaxes at night and farting takes place when we are fully conscious. But frequently farting at night could be a sign of poor health.Dr Sarah says: “Passing wind in bed could simply be a sign that you are eating too late in the evening, close to bedtime, and therefore are farting more in the night.“However, it can also be a sign of digestive disorders or food intolerances. Farting in your sleep is not dangerous to your health, but doing it a lot usually means an excess build up of gas and this needs checking out.