I could really use some help. My 8 year old son went to bed fine and woke up with sever knee pain. In two days he had pain his other knee too. He could barely put weight on either (but not swelling). He was walking with knees bent. We went to the doctor and they did a variety of tests. While we waited for the tests my son ended up in a wheel chair as he could not put any weight on the knees or walk at all. The tests showed nothing... no Lyme disease, no strep, everything was negative. My son had strep a few months prior, so the doctor advised it was probably that. They treated him with antibiotics. He improved each day and after 4 days, was almost back to normal. We also took him to a rheumatologist, but they also could not make heads or tails of this. They mentioned his thigh muscles were a bit weak. We took him for PT for 6 months. It seemed all was well.
Last week he woke up with severe knee pain again. We took him to the doctors. They checked for strep again and it was negative. We treated him with an antibiotic immediately, as we did not want this to spread to his other knee. In a couple days he improved and seems to be back to normal.
We have not been able to get a definitive answer from the doctors. We want to be sure we're being as proactive as possible in treatment to, hopefully, stop this from coming back.
If anyone has a smilar experience or things that should be considered for research, any insight would be appreciated.