For people who aren't familiar with the belief, it may seem like a completely bogus remedy for sun stroke. But there is genuine curiosity about whether this 'trick' works against intense heat. There are several threads on Quora where people have posed various questions around the same belief:
Onions For Summer
While we contemplate about whether or not the onion is effective against sun stroke, let us first look at the health benefits of eating onions in the summers. Onions are believed to have several health benefits when consumed raw during the summers. Red onions, which are the most commonly available variety in India, have a compound called quercetin, which acts against histamine. Histamine is the cause behind heat rashes and reactions to insect bites and quercetin has anti-histamine properties. Moreover, raw onions may also have a positive effect on your immunity, thus preventing the risk of contracting diseases. The juice from onions is also recommended for consumption as well as external use during summers, to treat heat stroke and soothe sun burns, respectively.Also Read: Heat Stroke Symptoms & Immediate Treatment
Onions Against Heat Stroke
So now that we've established that consumption of onions is healthy during the summers, let us establish whether onions are as effective against heat stroke, as is believed. Addressing this practice of carrying onions around in pockets during summers, Ayurveda expert Dr. Dhanvantri Tyagi said, "In earlier times, there weren't any proper means of transport and people had to often walk long distances. That's why they were advised to carry an onion in their pockets. Onions have volatile oils which are helpful in regulation of body temperature." However, Dr. Tyagi says that the practice must not be taken at face value and is merely symbolic. He adds, "The belief may stem from the fact that onions are very beneficial for consumption during summers and must be eaten regularly during the season."Also Read: 6 Surprising Ways to Use Onions Other Than Cooking With Them!
Dr. Tyagi recommends adding raw onions to your salads and cooking them in your sabzis. "In some villages, people still apply onion juice on the soles of their feet during summers. However, there is no scientific base to any of these practices", Dr. Tyagi said, while reiterating the health benefits of daily consumption of onions during summers. Another Ayurveda expert Dr. Ashutosh Gautam echoed the views of Dr. Tyagi, saying, "Eating onions may replenish the electrolytes in the body, as they are rich in potassium and sodium." He said that raw onions are also effective in triggering release of digestive juices for proper digestion.
Carrying an onion around in your pocket during summers will not serve any purpose, except drive people away from you, due to the smell it may generate. However, regular consumption of both raw onions and raw onion juice may certainly prove to be a healthy practice during the summers.