?轻率的

...轻率的 blindest; careless; featherheaded; flippant; flyaway; frivolous; giddy-brained; hairbrained; harum-scarum; hasty - deliberate; headlong; heedless; imprudent; incautious; indiscreet; indiskret adj; light headed; light-minded; lightly; madcap; precipitant; precipitate; rash; thoughtless; trifling; unadvised..

?轻微头痛

Sometimes you can wake up feeling groggy, light headed,exhausted, even though yougot eight, nine, or even ten hours of sleep.