Hello and thank you for your question.
I think you may have answered yourself. I have seen in my practice many times that patients are recovering from one foot, knee or
ankle injury and then they develop knee or
hip pain related to "walking funny" or favoring the part that hurts. The good news is that it usually does get better in a few weeks, and it usually doesn't turn into a no-fun game of "which joint hurts this week".
Things that you can do to help your knee and foot recover: put ice on the painful area for a few minutes at a time, several times a day. Gently stretch your legs once or twice a day, from your toes and ankles up to your hips. Give your legs "relative rest" - less running around, standing on your feet, if you can - but not
bedrest. Over the counter medicine such as
acetaminophen (
Tylenol and other brands) can help with pain. Gentle strengthening exercises for the foot and ankle include pulling a towel towards you on the floor by scrunching your toes, and using your toes to "paint" the alphabet in the air by movement of foot and ankle. Gentle strengthening exercises for the knee include straight leg raise (lift the leg straight up when sitting) or leg extension (lift the foot from the floor to straight out in front when seated in a chair).
I hope that this information is helpful for you, and that you are feeling better soon - both from your
plantar fasciitis and from your painful knee. If you have any further questions, please check back with us.