Too little sodium ๐งin the blood can cause all sorts of problems from cramp to death.
We generally associate too much salt with high blood pressure๐ฉบ but too little can be just as dangerousโ ๏ธ It allows water to enter the brain cells๐ฆโก๏ธ๐ง which makes them swell. This can cause headaches, confusion and (sometimes) deathโ ๏ธ
Marathon runners๐โโ๏ธ enthusiastic beer drinkers๐บ and people who take ecstasy๐ are all prone to low sodium in their blood.
Kidney or liver problems can cause fluid to accumulate which dilutes the sodium in the body โ causing the same problems.