My mother-in-law age 88 has not had her feet cared for the past 8 months.
Should she see a podiatrist for an evaluation of any foot problems? She is very tottery when she walks and claims that her knees hurt. Her doctor gave her a prescription for Meloxicam 7.5mg which she takes 1per day. She claims that she won't have any surgery on her knees. She only takes a Benicar 1 daily and Levothroxine 1 daily.
I know for myself, I need to wear what I call "nun shoes" which are sturdy with tie laces. I use to like to go bare foot around the house, but those days are starting to number, I feel much safer wearing shoes.
As Jessie above had mentioned, a Podiatrist to check the toe nails. A nail that is digging in can make walking painful.
As for knee pain, my Dad had that issue and he was given a prescription for Voltaren Gel, to which he called liquid gold as it worked really good on his knees. If your Mom has bone on bone in her knees, now a days there is a jell that can be put into the knees to help cushion the bone on bone.