Yes, willow bark.
Ginger and turmeric are amazing anti-inflamatories and pain relievers.
Barefoot grounding on the earth may help discharge a positive charge that is inflammatory - very common with all our gadgets.
Headaches can be caused by tons of stuff. What is the pattern of the headache? Where does it hurt? At the temples? Right or left? Over the eye orbits? At the top of the neck in back? What does it feel like? Dull ache, sharp pain? What time of day? Affected by weather or activities?
A few possible origins of headaches:
dehydration
jaw tension
electrolyte imbalance
caffeine addiction
posture, lack of ergonomic design in work spaces
eyestrain
stress
bad oils
MSG
lack of sleep
poor lighting,
CFL's
indoor air quality
mold
food allergies
chemical sensitivites
and so much more!