Bed rest
Bed rest was a period of resting in bed, with or without sleep. It was recommended for people who needed to recuperate from their illness or injury.

In 2151, Doctor Phlox noted that bed rest was the only cure he knew of for Malcolm Reed's common cold. ()

In 2270, Leonard McCoy informed the Enterprise yeoman that he was going to be getting a few days' bed rest, for an unknown injury or ailment, despite the fact that the doctor didn't think he deserved it. ()

In 2374, The Doctor recommended bed rest for  after he treated her fractured bone. ()

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Sleep