### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
My dad is 80 years old, and just had a kidney stone removed via surgery nearly 4 weeks after symptoms first appeared. During that time, he frequently took prescription pain meds. By the time of surgery, he was extremely weak and his potassium levels tested very high. Now, one week after surgery, his blood tests all came back fine, including potassium levels, and kidney function good; but he is so weak that he needs help getting up from sitting position, and his legs (mostly calves) are so sore and hurt so bad, mostly at night, that he cant sleep. He is really in pain. His calves felt rock- hard and tight at first, but feel somewhat loosened up now, but pain is still horrible. Doc said he was dehydrated, but he s been drinking lots of water and leg pain and weakness isnt improving. Doc did full work up on him, including checking for blood clots, didnt find anything, and says he is old and it will take time to recover. He was in very good shape for his age before this. Im worried. Any thoughts/suggestions appreciated.

### output:

Good Day! What kind of stone surgery was done on your father? If the work-ups done on your father came out all normal then it had already ruled out some serious considerations why he is still weak. I think he is still weak because he's body is still recovering from the trauma of the surgery and being 80 years of age would surely affect the recovery period. You may want to look into physical therapy to strengthen muscles and hasten recovery. Vitamin c once daily would also be helpful in recovery. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://www.ChatDoctor .com/doctors/ Chat Doctor.  Best wishes.