why do things taste too salty
The possible causes of a persistent salty taste are dehydration, medications, salivary gland diseases and post-nasal drainage, according to the Mayo Clinic. Rare causes include endocrine disorder, nutritional deficiency and neurological disorder, such as migraine and epilepsy.
Most occurrences of a constant abnormal salty taste in the mouth is linked to smoking, which greatly increases the rate of salivary gland infections. Post-nasal drip is also very common and can result in a bad, salty taste in the mouth, which is especially pronounced if the drip is caused by eye drops.