Dear Juli,
You might have your mom try 3 tablets of vitamin B-6 (100 mg) a day. I take 2 in the morning and one at night to try and help with the foot and hand syndrom. My sister told me about this. She has been an RN in the oncology field for 25+ years. She said oncologists where she works routinely have patients take these vitamins for the sore feet. It seems to have worked for me as my feet have only gotten inflamed and raw maybe 3 days each cycle. I also use Udder Smooth and Udder Balm (small green can) when my feet dry and sore. I am just finishing my 11th cycle on Sutent 50 mg on Thursday. Good luck!
PS.. Have your mom check with her Dr first.