Onion juice
This is one of the best remedies for treating a heatstroke. Applying onion juice behind the ears and on your chest can help bring down your body temperature. For therapeutic purposes, onion juice is more desirable, but you can also roast some raw onions with cumin and honey and eat it as well. Raw onions in chutneys or salads can also cool your system.


Tamarind Drink
Tamarind is rich in vitamins, minerals, and electrolytes. Soak some tamarind in boiling water. Strain it, and drink it with a pinch of sugar. This decoction lowers your body temperature. Tamarind juice also acts as a mild laxative and helps in treating stomach disorders.


Plums are a great source of antioxidants and are known to be very hydrating. These antioxidants lend anti-inflammatory properties, which help in soothing internal inflammation that may be caused by a heatstroke. Soak some plums in water till they are soft. Mash them in the water and strain it.


Buttermilk and coconut water
Buttermilk helps in replenishing your body with essential vitamins and minerals that may be lost due to excessive sweating. Similarly, coconut water rehydrates your body by naturally balancing the electrolytes in your body.


Juice of coriander and mint leaves
Extracting the juice of coriander or mint leaves and drinking it with a pinch of sugar is an easy home remedy to bring down the body heat. Due to its cooling properties, coriander water is also considered to be a great remedy for reducing menopausal heat and flushes. Coriander juice can also be applied for soothing hot, itchy skin.

Courtesy: http://food.ndtv.com/