Foot pain caused by high uric acid is due to uric acid is too high in the body, which stimulates bones and joints. Soaking in salt water won't cause more pain, but it won't relieve it there. The most fundamental way is to pay attention to diet adjustment, such as not drinking, not eating seafood, eating less red meat, eating less vegetables with high oxalic acid content such as spinach, amaranth and leek, and eating more root vegetables such as carrots, potatoes, zucchini and onions.