<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have my mother in law in the hospital that is recovering from back surgery 1 month ago. Her feet hurt on the top if you touch them and she cannot stand on them. By the arch she has redness like a bruise on the sides of the arch. Her potassium level is low so they kept her overnight. Her potassium is still low after 24 hrs. Her uric acid was on the high side and they thought she had gout. They are doing an MRI tomorrow on her feet.  <response>: Hi, I had gone through your question and understand your concernsWith such presentations in my clinic, two possibilities are common for foot pain:first possibility:Hyperglycemia, Gouty arthritis is one of the common causes of foot pain which could be treated by rate lowering Chat Doctor. Second possibility: Reticular pain from back problem due to Nerve root injury, for this possibility you have to wait, and I suggest using neurotics. 