Headaches can be caused by a variety of factors, including dehydration, digestive upset, liver and colon toxicity, tension in the neck and shoulders causing vertebral misalignment, and stress. Many headaches can be relieved by rubbing Tei Fu oil and lobelia into the neck and shoulders. APS II in combination with White Willow Bark, Nerve Eight, and IF Aspirin and other over-the-counter pain relievers can be replaced with relief. If your headaches are caused by a hormonal imbalance, Master Gland may be of assistance. The following are some general headache remedies.