After you drink alcohol your body is dehydrated so it produces hormones that make your kidney hold on to water.
This increases your blood pressure and can give you a headache, one of the worst symptoms of a hangover.
The TikToker explained: “Your liver is also actively trying to break down the alcohol from last night, creating chemicals called thromboxanes in the process.
“It’s this increase in thromboxanes that leads to flu-like symptoms like nausea, vomiting and diarrhoea.
“When you drink alcohol you also get dehydrated and lose electrolytes which can lead to a headache in the morning.”
To solve this problem, Octavian recommends drinking plenty of water with salt or electrolytes before, during and after the party to rehydrate and prevent or stop a headache.