Someone who wakes up with a headache every day may be experiencing sleep apnea, according to WebMD. This is most likely the case if the headache follows snoring.
Sleep apnea occurs when the airways close while sleeping, or when the brain fails to send signals telling someone to breathe. A study conducted by Dartmouth Medical School in Lebanon found that 67 percent of people waking up with headaches had sleep apnea. This figure rose to 81 percent in those who had headaches and experienced snoring. As sleep apnea disrupts breathing, individuals experiencing the symptoms should discuss them with a physician.
People who overuse medication may also wake up with a headache, Mayo Clinic states. Individuals who experience a sudden onset of severe headaches should discuss the matter with a doctor.