The dangers of eating too little salt are as follows: 1. High incidence of muscle weakness, because sodium has an important regulatory role in neuromuscular contraction. If you eat too little salt, it will lead to a decrease in muscle strength and nerve conduction disorders, which will cause a high incidence of limb weakness and paralysis. 2. It may cause an imbalance in body fluid, because sodium, as the main cation in the extracellular fluid, plays an important role in the maintenance of intracellular and extracellular fluid. If too little salt is eaten, it can cause changes in osmotic pressure and lead to a high incidence of intra- and extracellular swelling.