It could be said that mathematics is the language of physics. That is another way of better understanding what is physics. Numerical values, units of measurement, and similar concepts are all mathematical in nature, and are used to describe physical quantities in the most accurate and precise manner.
In brief: Cough headache. There are a couple of possibilities. Coughing can raise the pressure inside your head, which can cause pain sometimes. There is also a poorly-understood entity called the primary cough headache,  that is associated with coughing, straining, laughing, crying, etc.
Other telltale symptoms: Your cough gets worse when youâre lying down or eating. âThe classic sign is coughing that starts as soon as you lie down in bed at night,â says Dr. Parsons. About 75% of GERD patients with chronic cough have no other symptoms, but if you do they can include heartburn and hoarseness. Diagnosis and Rx: Tests may include an x-ray of your upper GI tract and/or an endoscopy (where your doctor inserts a thin, flexible tube down your throat to examine it).