2024年9月23日 · Dr. Elizabeth Bright, , DO, ND, MICO. Published on. September 23, 2024. People are aware of the symptoms of low sodium. Migraines, confusion, fatigue, nausea, vomiting, muscle cramps, muscle spasms, and weakness are common symptoms. It’s normal to need salt after intense sports. It’s not only because you will probably sweat.