The variation by cause is wide.

BPPV tends to be resolved comparatively quickly with the repositioning manoeuvre, while the recovery period after vestibular neuritis takes a few weeks to a few months. Dizziness associated with the cervical spine or with stress goes along with the period of addressing that background.

There is something to know about the recovery process. After a vestibular condition, a period comes where you are comfortable when still but light-headed when you move. Avoiding movement at this point actually delays recovery. Moving a little at a time even while dizzy is known to support the brain's compensation.

However, there is a risk of falling, so please do it in a safe environment.