There are many possible causes of joint pain. Arthritis, Lyme’s Disease, muscle strains and even barometric pressure are possible causes of joint pain and stiffness. But did you know that dehydration can also be a source of joint pain? That’s right, your daily intake of water largely affects not only your overall health, but the health of your joints as well. To better understand just how water affects your joints, it’s important to know what joints are and how they work.