Why does eating greasy food give you a headache?

Because when the spleen and stomach function is normal, the clear gas goes up and the turbid gas goes down. If you eat too greasy and exceed the functional limit of the spleen and stomach, it will damage the normal operation of the spleen and stomach. Strong paste flavor can also easily lead to dampness and phlegm, which are the factors leading to dizziness and headache. So eating too much greasy food can lead to dizziness and headache.