I'm impressed she can jump out of a low beach chair! I practically need a crane to get me out.
Seriously, I would encourage you to get this checked out. Most people use a two week rulr - if a new symptom persists for two weeks check it out.
Not to scare you, but you are probably aware that her2+ cancer likes to go to the brain, so my oncologist has a super low threshold for any neurological symptoms. An MRI would rule out any issues, and would probably not be a normal part of her upcoming scans.
It's probably nothing, or jumping up and down too much
. Tykerb is somewhat protective of the brain anyway as it is a small molecule that crosses the blood brain barrier, which herceptin does not.
Nevertheless, you do want to be vigilant as brain mets, scary as they are, are also treatable especially when caught early.