Your question is bit unclear...I guess you are talking about local anaesthetic injection or cortisone injection... Tell her to avoid sitting down for long periods of time. When seated, do not sit on hard surfaces and she can do alternate sitting on each side of the buttocks. Also, lean forward and direct her weight away from the tailbone....if your orthopedic surgeon has suggested means they would have assesed benefits and drawbacks so it's better to go according to their guidance.. Regards.