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When it comes to headaches, they are very often triggered by certain foods or drinks. Once you notice a headache coming on, write down everything you recently drank or ate. This is important, as it will give you more information to consider when you look for patterns and triggers later. Some foods you might want to pay special attention to include:  Aged foods Alcohol, particularly red wine Processed, fermented, or cured meats Food or drinks that are overly cold (like iced tea or ice cream) Smoked or dried food Caffeinated products MSG Chocolate Fish or shrimp Miso soup or yeast extract In addition to foods and drinks, medications and other substances can trigger the onset of a headache. As a result, you should record any medicine or substances you used prior to the onset of a headache.  If you smoke tobacco or marijuana, record when you used them. If you're on a prescription medication for anxiety, depression, sleep problems, or anything similar, write down when you took them and how they impacted you. If you use a medication (prescription or over the counter) to treat your headache symptoms, record how well it works. Include herbal medicines Headaches can also be triggered by certain activities that you do every day. As a result, you should record what activities you engaged in prior to the onset of your headache. Pay attention to:  Exercise habits Sleep habits Stress levels Places you visited prior to the onset of the headache. There is a chance your headaches could be triggered by the presence of mold, mildew, or chemicals in the air at a given location. Anything unusual you experienced before you got the headache.

Summary:
Track what you eat and drink. Note what medications or other controlled substances you used. Record your activities.