This can lead to high blood pressure, which can cause other problems. Too much sodium in the blood is a condition called hypernatremia. Too little sodium in the blood is a condition called hyponatremia.
Craze lines are  minor cracks that are superficial and affect the outer enamel of the tooth only and are common in all adults. These lines do not cause any pain and hence no treatment is needed. They mainly occur due to the normal wear and tear on teeth.
Hardline IS part of salesfloor. Salesfloor Hardlines and Salesfloor Softlines. Also, unless it's an extremely low volume store, sales floor TMs don't stock per se. You probably just saw them putting away reshop. Or go-backs as I've seen some people on here call it. The guys who do the pulls from the back...i forget what they're job title is...they generally do the stocking.