Why do i crave salt excessively? i've read among other diagnosis that craving salt is a symptom of addisons disease?

Possibly: Although salt craving is a symptom of addisons disease, most people who crave salt do not have this disorder, as it is very rare. Major symptoms of addisons also include loss of appetite, nausea, weight loss, lightheadedness when standing due to low blood pressure, skin darkening. If addisons disease is suspected, the diagnosis should be confirmed by an endocrinologist before starting medication.