Depends what are causing your headaches -- sometimes I get headaches from working with foral essential oils.
If for just normal headache, Peppermint, Spearmint, Cedarwood, Bergamot, Cejeput, Clary Sage, Marjoram, Patchouli, Lavender, Basil, marjoram, Helichrysum.
If for chronic migraines...