HI, thanks for using healthcare magic
can results in the loss of fluids and electrolytes from the body. One of the electrolytes that can be lost is potassium.
Low levels of potassium can sometimes result in weakness and cramping in the muscles and may have contributed to the symptoms she was experiencing.
Low levels of potassium can in some persons, also affect the rhythm of the heart.
There are other possible causes beside the diarrhoea. Low potassium can also occur in persons with leukemia
as a side effect of some of medications.
Potassium can be replaced and the levels improved. Her doctors will monitor the levels to ensure that they are ok. Once the potassium levels are corrected then she would have no issues with that.
I truly wish her the best and hope this helps