Hi Christina
Welcome to the forum.
Your relative doesn't have to leave any time - they can reapply immediately.
Just be aware that the Tribunal could not take into account your relative's worsening condition. They can only make a judgment about the original decision - not anything that happens afterwards.
Make sure that you have the statement of reasons from the tribunal to understand why your relative lost. Also I'm not saying you didn't do this last time, but have a good look at the guide to PIP claims and reviews to see where you can strengthen your argument when you try again.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
