I am 21 year old, Male Sir, from last two month on wards I feel some pain in my joints, Special situations that make me painful are as follows, 1. I feel lot of pain at back of my neck, after attending long sessions.(having duration more than 1 hour) and riding bike, I feel lot f pain on neck even am traveling much small distance on bike (less than 10 KM) 2. I feel a pain on back of my two leg knees when I walked little distance more or I stand for few hours while engaging in any drawing related to my studying subject. 3. I also gets the same feel of pain on back of my hand knees when I drive car through pocket roads having number of turnings. (Car do not have a power steering option) Sir, I would like to know the reason for this. Even though the pain is not long lasting its makes me lot of disturbance. Is it any deficiency of calcium, Vitamin or some thing like that? Can you please suggest me a solution to recover.