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.
Lines of incision made parallel to them are thought to heal more efficiently. Called also cleavage lines. lead line a purple-blue line at the edge of the gums in chronic lead poisoning; called also blue line. lip line a line on the teeth at the level to which the margin of either lip extends. median line an imaginary vertical line dividing the body equally into right and left parts. milk line the line of thickened epithelium in the embryo along which the mammary glands are developed.