To be absolutely brutal and honest with you, nobody cares about I look forward to hearing from you.. The practical reason is that it's one of the various standard and conventionally polite ways to end the body of the letter. It's just a standard exit.
1 In some cases, liver failure causes this taste to occur. 2  Gastroesophogal reflux disease can cause the salty taste (even when no pain is present). 3  Some medicines can make everything taste odd. for example the drug enalapril, which is a drug used to prevent heart failure.
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. The few medical conditions that could result in a salty taste in the mouth each have much more obvious symptoms that are noted first.