Your mother is suffering from CIPN meaning chemotherapy
induced peripheral neuropathy
Peripheral neuropathy is disorder of nerves apart from the brain and spinal cord
. Patients with peripheral neuropathy may have tingling, numbness, unusual sensations, weakness, or burning pain in the affected area. Oftentimes, the symptoms are symmetrical and involve both hands and feet. Because the symptoms are often present in the areas covered by gloves or stockings, peripheral neuropathy is often described as having a “glove and stocking” distribution of symptoms.
Chemotherapeutic drugs cause peripheral neuropathy, including the plant alkaloids (vincristine
and vinblastine), taxanes (paclitaxel and docetaxel , platinum-based compounds (cisplatin,carboplatin and oxaliplatin).
Your mother has bowel cancer
and is most probably using chemotherapy drug oxaliplatin which causes the ocuurence of CIPN is as high as 70 to 90%.
CIPN takes time to get reduced.It takes about 6 months to 1 year after completion of chemotherapy to get reduced totally.
Your mother can take tablet Lyrica 75 mg twice daily after food for 1 month.It contains pregabalin which will help her to reduce her painful condition.