In some cases, headache and nausea are signs of a serious underlying health condition. You should seek immediate medical attention if you experience a very severe headache, if your headache and nausea worsen over time, or if you experience any of these symptoms along with your headache and nausea: slurred speech ; confusion; dizziness
Drinking milk before bedtime is a folk remedy for people who suffer from acid reflux and heartburn during the night. Milk has a soothing effect on the stomach and throat, providing temporary relief. But milk also has a rebound effect that can cause heartburn later.
Lactic acid is found naturally in sour milk but also commercially produced from whey, cornstarch, potatoes and molasses. Therefore, if listed on a product as an ingredient, you must verify its source.