The composition of onions has the power to heal many diseases. A lot of  scientific studies published on the compounds of onions show that they are highly protective to the nerves and the cardiovascular system, and that they enhance immune function, fight the growth of many types of tumors, help to promote healthy hormone function, and many more.
It is excellent in lowering cholesterol, inhibits hardening of the arteries, enhances elasticity of blood vessels, and helps to maintain healthy blood pressure.
Onion also helps in fighting cancer and is a great risk-reducing food.
Also, onion demonstrates significant blood sugar-modifying properties to be a real help in the fight against both type 2 diabetes and obesity. It won’t be a miracle food to kepp you in shape, but it will sure help. In addition to limiting your intake of fats and sugars, eating onions can get your blood sugar-and your weight-on the right track.
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The medical properties of onion
What nions are rich in is a flavonoid called Quercetin. Flavonoid acts as a powerful antioxidant, antihistamine, anti-cholesterol, and anti-inflammatory. Also, onions have antibacterial property and eliminate toxins from the body. The highest concentration of quercetin can be found in and onions at the part of the bulb closest to the root and its outer most rings nearest the skin.
Of course, always try to go for organic grown onions if you can.
  1. Onions to help cold
Onion has been forever used as an effective for cold. You can eat a whole raw onion at the first sign of a cold, or you can boil the onion and drink it in tea with ginger and honey.
  1. Onions to bring down a fever
Here is a recipe for lowering fever:
  • Chop some potatoes and onions, and together with some minced garlic put them in a pair of socks.
  • Put them on your feet and get in bed
  • Apply a cloth soaked in apple cider vinegar on your forehead
This recipe will come down your temperature in the next hour.
  1. Onions to cure a cough
Onion cough relish-recipe:
  • Take one large onion, peel it and cut it in half
  • Cover the tops of both halves in ½ tblsp brown sugar
  • Let it sit for an hour and then hollow up the syrupy contents from the dish.
  • Consume it twice a day
The brown sugar makes the onion juice more palatable. This is simple, effective and cheap natural remedy. Also, you can make a juice of honey and onion. The honey will soothe your cough, and onion has powerful antibiotic properties.
  1. Onions for earache and wax build up
If you suffer from frequent earache or constant ear wax build up just put an onion in your ear, but not a whole onion, only its most inner part also called the heart of the onion. Because of its powerful anti-inflammatory properties, onion will significantly relieve your pain. It will also soften the ear wax making it easier to remove. Apply the onion before going to sleep and the next morning you`ll feel much better.
  1. Onions to remove an eye irritant
To help yourself from an eye irritation, just cut a piece of onion to get the tears flowing up. This will ease the irritant out of your eye. NOTE: do not rub your eyes because you can worsen the condition and cause serious injury.
  1. Onions to heal a cut
If you get a sudden cut, simply apply a slice of onion on it to prevent infection and to clean it. Afterwards, apply some of the onion skin and place it over top of the cut to seal it. Your wound will be cleaned and the bleeding will stop very quickly. In case of larger cuts place a small piece of gauze or some paper medical tape to keep the onion skin in place change the gauze twice a day.
  1. Onion juice to heal surgical wounds
This is a powerful and effective natural remedy which will heal your wound without the help of any drugs. Also, it is especially useful because prevents scarring, particularly in people with darker skin.
  1. Onion to remove infection
Onion paste to draw out infection:
  • Boil milk and pour it onto a thick slice of white bread
  • Grate an onion on top of the bread
  • Mash it into paste
  • Clean the infected area and apply the onion, milk, bread paste
  • Place the paste on the affected area
  • Make sure you sit still to allow the paste to harden and pull the infection out of the body.
Note: do not break the seal. After a few hours the infection will start to come out the body. Clean the wound and repeat the procedure twice a day until the infection is gone.
  1. Onions to heal a burn
Just slice the onion in half and apply directly to the burn. Let it stay for 2 minutes. You will start to feel relieve after a minute. Afterwards, whip up some egg whites and apply to the burned area and let it dry in order to form a protective barrier. Cover with a clean gauze bandage. Clean and replace the bandage when necessary. The burn will be healed instantly and there will be no scars.
  1. Onion to soothe bee stings and other insect bites
If a bee or wasp stings you, first remove the stinger from your skin. Then cover the bite with a grated or crushed white onion. Onions have anti-inflammatory properties which will reduce the swelling and the natural antihistamine will prevent allergic reaction.