Sinus Infections
Natural Remedies

Find Relief from Sinus Infections Naturally

| Modified on May 14, 2026
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Boric Acid and Sea Salt
Posted by Rob (Kentucky) on 05/01/2026
★★★★★

I have been re-visiting my roots and how in grandmother (born 1910) used boric acid and borax around the house and farm.

Sinus Irrigation using Boric Acid USP / Sea Salt nasal rinses areused to treat chronic rhinosinusitis and sinus issues, often utilizing 1 – 2 teaspoons of boric acid powder in 8 oz. of saline distilled water to reduce bacterial of fungal load. These solutions work by reducing mucosal edema, drawing out mucus, and treating infections.

Boric acid is a mild, topical antiseptic used to inhibit bacterial and fungal growth on the skin. Boric acid is primarily used medically as avaginal suppository to treat recurrent yeast infections and bacterial vaginosis, especially cases resistant to conventional antifungal treatments. It acts as an antiseptic, antifungal, and antiviral agent, helping to balance vaginal pH and odor. It is also used in eye drops, ear drops, skin antiseptic solutions applied to cuts, scraps and burns, and for athlete's foot.

It acts as a bacteriostatic and fungistatic agent, meaning it inhibits the growth of bacteria (like E. coli and various streptococci) and fungi (likeCandida), rather than killing them outright. They work in conjunction with the host's immune system to eliminate infections by inhibiting bacterial protein production, DNA replication, or metabolism. Common bacteriostatic antibiotics include tetracyclines (e.g., doxycycline), macrolides (e.g., erythromycin, azithromycin), sulfonamides, and clindamycin..It is effective against antibiotic-resistant bacteria. Boric acid can kill parasites, specifically Trichomonas vaginalis (causing trichomoniasis) through vaginal suppositories. It acts as a desiccant against pests like insects and flea larvae.

Bacteria Boric Acid is Effective Against(but not limited too)

Escherichia coli (E. coli): Effective against various strains, including those tested in vitro.

Pseudomonas aeruginosa: Weakly bactericidal, often used at concentrations of 10 g/l.

Acinetobacter calcoaceticus/septicus: Shows susceptibility in laboratory tests.

Group B streptococci: Satisfactorily inhibited at concentrations of 10 or 20 g/l.

Coliform bacteria: Effective in reducing numbers in experimental studies.

Staphylococcus aureus (including MRSA): Shows susceptibility to boric acid and borate salts.

Propionibacterium acnes: Associated with acne, targeted by the antiseptic action of boric acid.

Gardnerella vaginalis: Associated with bacterial vaginosis (BV).

Salmonella Enteritidis: Reduced in in vitro, though not in vivo, studies.

HERE IS MY FORMULA:

1-2 teaspoons Boric Acid USP (HUMCO Brand)

1-2 teaspoons Sea Salt (the more salty the better. Salt reduce sinus congestion, postnasal drip, and remove allergens and mucus)

8 oz. distilled water

Neti-pot (Gurunanda neti pot at Dollartree $1.25)

Put 8 oz. distilled water into a glassware measuring cup and heat it in the microwave for about 1 minute or heat in a pan on stove. Boric acid dissolves better in warm water. Then add the Sea Salt. Stir til dissolved. Allow too cool to room temperature. Load neti-pot and irrigate sinuses. Do this 2 times daily til sinusitis is resolved.

Source Book: Borax the Magic Crystal 1915

Link: https://www.elsmerecanyon.com/tickcanyon/borax/borax.pdf

From the Book; Tonsils and Adenoids – Treatments and Cure from the Standpoint of the Physician and Laryngologist in Preference to that of the Surgeon and Laryngectomist, by Richard Biddle Faulkner · 1915

PRESCRIPTIONS.

(A) Rx

Powdered Borax – Grains 68 (4.4 grams = one teaspoon)

Essence of Peppermint (Peppermint oil) – Minims 20 (1.2 ml = 24 drops

Warm water – One pint

A toilet requisite for the nose and mouth. A cleanser and sterilizer. Saturate a wad of absorbent cotton

with the solution and carefully mop out the vestibule of the nose, morning and evening, or more frequently, when necessary. This method of keeping the nose clean is greatly preferred to that of using atomizers and douches, as the latter serves only to wash filthy matter farther in, and at the same time leads to trouble in the ears and antrum. The solution is also a very efficient gargle.

From the Book – Dr. Chase's New Receipt Book and Medical Advisor or Information for Everybody by A.W. Chase MD, page 88. 1927.

BORAX – Its Value in Catarrh, Throat Difficulties, Inflamed Eyes, Dandruff, etc.

– I. A solution of 1 Dr.(¾ teaspoon) to soft water, 2 pt., snuffed up into the nostrils, is valuabie in catarrhal difficulties; if recent. it will effect a cure. Use 3 times daily; though I must say I think it is easier taken in powder, as a snuff, and better too, takeÅ„ 5 to 10 times daily. I combine sugar, dr., with powdered borax, 1 oz ; and put in a few drops of white rose perfume, as a snuff; and if the throat is sore, drop a pinch of it into the throat at each time of snuffing. It soon benefits both difficulties.

Anchor Google Patients: Methods of treating Chronic Rhinosinusitis with Boric Acid

Source: https://patents.google.com/patent/US20160271173A1/en

The formulation comprises boric acid in an amount (weight per volume, w/v) from about 1.0-4.0%, particularly from about 1.0-2.5%. In particular embodiments, the formulation comprises boric acid in an amount of about 2.0% (w/v).

In various embodiments, the formulation additionally comprises a saline solution, wherein the concentration (w/v) of sodium chloride (NaCl) in water is from about 0.5-1.2%. In a particular embodiment the concentration of sodium chloride in water is 0.9% (w/v), that is, isotonic saline. In one embodiment, the formulation comprises about 2% (w/v) of boric acid in a saline solution having about 0.9% (w/v) of sodium chloride in water.

In various embodiments, the method of administering the boric acid formulation comprises applying a volume of the formulation into each nare of the subject in need in a manner sufficient to penetrate the nasal and paranasal cavities. The volume of the formulation may be administered by any appropriate means known to those skilled in the art and include, but are not limited to, douching, nebulization, atomization, inhalation, irrigation, spray, drops, or insufflations. In particular embodiments, a volume of the formulation is administered by drops into each nare. In other particular embodiments, the volume of the formulation is applied by spray into each nare.

A present invention further provides a formulation comprising boric acid for use in treating chronic rhinosinusitis. In various embodiments, the formulation comprises about 1.0-4.0% (w/v) of boric acid, more particularly about 2.0% (w/v) of boric acid. In some embodiments, the formulation further comprises a saline solution having about 0.5-1.2% (w/v) of sodium chloride in water, in particular a saline solution having about 0.9% (w/v) of sodium chloride in water.

An in vitro study of boric acid against cultured Candida albicans demonstrated that 1% aqueous boric acid showed complete growth inhibition against 45 of the 46 fluconazole-susceptible strains tested and 24 of the 25 fluconazole-resistant strains tested. Using a focus set of six C. albicans strains the authors of this study were able to convincingly eliminate pH as a primary basis for the fungistatic effects of boric acid. No sign of sudden physical membrane damage was apparent and membrane integrity decreased only slightly during 24 hour exposure to 1% boric acid. (De Seta et al. (2009) J Antimicrob Chemother 63(2):325-36.) This same study reported that 2.5% boric acid was sufficient for complete growth inhibition of 17 of 17 bacterial strains tested including Staphylococcus aureus (2 strains), Enterococcus faecalis, Staphylococcus saprophyticus, Staphlyococcus epidermis, Bacillus sp., Streptococcus pyogenes, Streptococcus agalactiae, Citrobacter freundii, Enterobacter cloacae, E. coli (2 strains), Klebsiella pneumonia, Shigella sp., Proteus sp., Salmonella sp., and Serratia sp. (De Seta et al., supra.



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