Whether it's on a roast beef sandwich or in an herbal preparation, it clears sinuses, increases facial circulation, and promotes expulsion of mucus from upper respiratory passages. It has been used as a medicine for centuries.

Is helpful for sinus infections because it encourages your body to get rid of mucus. One way a sinus infection starts is with the accumulation of thick mucus in the sinuses, which lays out the welcome mat for bacteria: Stagnant mucus is the perfect breeding ground for bacteria to multiply and cause a painful infection. It can help thin and move out older, thicker mucous accumulations; thin, watery mucus is easier to eliminate. If you are prone to developing sinus infections, try taking it the minute you feel a cold coming on to prevent mucus from accumulating in your sinus cavities. Herbalists also recommend it for common colds, influenza, and lung congestion. Incidentally, don't view the increase of mucus production after horseradish therapy as a sign your cold is worsening. The free-flowing mucus is a positive sign that your body is ridding itself of wastes, so bear with it for a day or two.

It has a mild natural antibiotic effect, and it stimulates urine production. Thus, it has been used to treat urinary infections. If you experience chronic urinary, sinus, or other infections, you should know horseradish is considered safe for long-term use.

Occasionally, it is used topically to alleviate the pain of arthritis and nerve irritation. it also has been used as a poultice to treat infected wounds. However, may redden the skin and cause an irritation or rash.

Simple Preparations and Dosage

The root keeps for several months in a resealable plastic bag in the refrigerator. (Fresh root is superior as a medicine) Wash, then grate the radish in a food processor or blender. (You can use a grater, but you may not be able to see what you're grating through your tears.)

Add honey or sugar and vinegar to taste (about 2 tablespoons honey or sugar and 1 tablespoon vinegar per cup of horseradish).

If you can tolerate its flavour, spread 1/4 teaspoon of prepared radish on a cracker and eat it, or stir the horseradish in a sip of warm water with a little honey.

You can make a poultice to treat a wound, or soak a cloth in horseradish tea and apply the cloth to the wound. Discontinue if the skin reddens or causes irritation or a rash.

Possible Side Effects

Pain in the head, especially behind the root of the nose, is a common but brief side effect.

Large, repetitive doses of it may cause stomach upset and even vomiting in some people, so keep to small does as explained above, dont eat a jar a day! 

Rashes and inflammation may follow in some people.

If you experience gastrointestinal distress after eating other sulfur containing cruciferous vegetables, such as cabbage or broccoli, you may not want to use horseradish. You may experience an upset stomach from even a single small amount.