In case of a headache caused by sudden hypotension, pickled cucumber helps to improve well-being, nutritionist Elena Solomatina said.
In an interview with a physician, an opinion was expressed that that food can be both a “cure” for a headache and its trigger. In particular, wine, cheese, chocolate, smoked meats, or foods with sodium nitrite are potential pain triggers. The occurrence of an unpleasant sensation is explained by how these products affect the blood vessels.
“Headaches can be associated with narrowing or expansion of blood vessels – the blood does not normally reach the brain in both cases,” Solomatina told Vechernyaya Moskva. .
The doctor added that the same product can have different effects depending on the state of a person's vessels or existing chronic vascular pathologies. For example, pickled cucumber can be “a cure for headaches:
Bean salad
“If your head hurts due to low blood pressure, pickled cucumber can help relieve pain.”
Then at the same time, with existing hypertension, this product may not help at best.
In which case salt can become a “medicine”: cardiologist Bokeria reduce blood sugar levels. 
Elena Solomatina healthy lifestyle nutritionist