Salt craving is a demanding or extreme desire to consume salt or salty foods. Craving for salt results from a decrease in sodium in the body either from inability to retain salt or the excess loss of sodium from the body. Salt craving is common during pregnancy. Craving for salt is also a common symptom of Addison’s disease (decreased production of hormones by the adrenal glands), dehydration, and electrolyte imbalances. Depending on the cause, your salt craving may last only as long as it takes to rehydrate following mild dehydration from heavy sweating. It may also be a permanent symptom, as is found with Addison’s disease, and may be accompanied by other symptoms or signs including low blood pressure (hypotension), fatigue, loss of appetite, and chronic diarrhea. Left untreated, salt craving due to severe dehydration is a serious condition. Severe dehydration and electrolyte imbalances can result in shock or coma and may be life threatening.
Salt (sodium) is a requirement by all human beings as a survival nutrient. Some people like it, some people hate the taste, and some people like yourself, love it. A taste of salt is a learned liking or disliking. We also have 4 other tastes 2 from birth (bitter and sweet) and the others are learnt (umami and sour). But don't consume that much salt, it will clog your arteries leading eventually to a heart attack or stroke. I would suggest using google scholar to find scientific journal articles on how much salt you should healthily consume - I'm sure you'll find plenty. Just a friendly warning, ultimately the choice is yours. I hope this helps.
The craving for pure salt can be due to a medical condition or it could be due to dehydration. You can cure the craving by drinking plenty of water. It would be best to seek further medical attention from a doctor.
It is a craving . If you have been checked by a doc - which you indicate - it is a habit like any other habit. You need to break the habit as it will eventually catch up to you just like any other bad habit