Mubarak, serving a life sentence over the killings of protesters, was briefly taken to hospital on 19 December for scans after he fell in his prison bathroom and hurt his head.
Mubarak, 84, will be returned to prison after he is treated, the source said.
A court sentenced the veteran strongman to life in June for failing to prevent the killings of protesters during the 18-day revolt that ended his three-decade rule in February 2011. Some 850 people died in the uprising.
Mubarak spent nearly a month in hospital after he fell unconscious on 19 June, with state media declaring him clinically dead on arrival. But medical sources said he appeared to have fallen into a temporary coma.