Listen to your body
Sometimes musicians forget the importance of being fit not only in mind but also in the body. If you're straining to read the music sheet in front of you, do have your eyes checked. If you're having trouble deciphering tones coming from your instrument, consider having an ear exam. If your back hurts every time you sit down to practice, determine if this has something to do with posture. Listen to your body; if it feels something is not quite right, schedule a check-up as soon as possible.
(Resource from the web)