There may be many causes for earache, cool air could be the reason for earache.

Sometime it starts due to inflamation of ear and sometime it starts when other part of our body is effected for example pain in teeth, nose, tongue or jaws could be the reason for earache, so it could be difficult for common man to find the main reason for earache.

Treatment...

Aspirine is best in earache and Sanodon ear drop is also best for earache use hot cloth and if pain still remain so call the doctor immediatly.

Good Luck!