Salt is problematic because it can cause water retention and high blood pressure. Maintaining the appropriate fluid balance in your body is crucial to lubricating and cushioning joints, but too much causes bloating and inflammation. Swelling in the joints contributes to pain during use.
It is shockingly easy to get too much salt in your diet – avoiding junk food and processed meals can help a lot. If you have arthritis and take a corticosteroid, your doc will definitely want you to reduce your sodium intake as this medication causes even more salt retention.