I looked up side effects and methotrexate, but couldn't find anything like what you described. Without more details, it's difficult for me to advise you, but I would definitely suggest you speak to you rheumatologist or your family doctor about this. Depending on where your symptoms are located, when they started and whether they come and go, you may have a trapped nerve somewhere or this could be a neurological symptom which could possibly be related to your medication(again, this is just a guess and not a very educated one as that - I am not a doctor). I wouldn't worry too much, but do speak to a doctor about it.
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.