palpitations, tremor, headache and insomnia increased significantly with mean caffeine intake. A multiple logistic
Headache is a common finding in both OSAS and insomnia patients. Because morning headache seems to be more specific for OSAS than insomnia, and in OSAS its occurrence seems to be associated with disease severity, we hypothesize the involvement of certain pathogenic mechanisms associated with OSAS.
Headache characteristics in obstructive sleep apnea syndrome and insomnia