Conjunctivitis is a condition that affects the eye and is characterized by inflammation of the conjunctiva, a transparent membrane that covers the cornea and inner eyelids. Symptoms of conjunctivitis include red and watery eyes, soreness and a sticky coating on the eyelashes upon waking. Conjunctivitis may be caused by irritants, allergies or an infection. The University of Maryland Medical Center (UMMC) website notes that conjunctivitis usually goes away by itself. However, chronic cases may require treatment, usually with antibiotic or antiviral eye drops. Some herbs may help to alleviate conjunctivitis, although scientific evidence to prove that they work is limited.
Consult with your health care provider before attempting herbal treatment of conjunctivitis.
Eyebright
According to the UMMC website, eyebright, also known as Euphrasia officinalis, may help to fight infection and dry watery eyes. Results of a study published in December 2000 in the "Journal of Alternative and Complementary Medicine" show that using one drop of a single-dose concentration of eyebright eye drops three times daily can relieve symptoms of conjunctivitis, such as redness, swelling and burning of the conjunctiva. Lead author, M. Stoss, notes that treatment was well-tolerated by patients who took part in the study.
Calendula
Calendula, also known as pot marigold, may help to soothe irritated eyes, notes the UMMC website. According to the U.K. Herb Society, calendula has antibacterial and antiseptic properties and may be used as an eyewash for conjunctivitis. Calendula contains chemicals known as flavonoids which may also help to reduce inflammation. The UMMC website suggests diluting five drops of a calendula tincture in one quarter of a cup of boiling water, allowing the solution to cool and then applying it to closed eyes with a gauze pad. Discontinue use if any irritation or stinging occurs.
Ginkgo Biloba
According to research findings published in May 2009 in the "European Journal of Opthalmology," eye drops containing Ginkgo biloba and hyaluronic acid can help to relieve symptoms of allergic conjunctivitis. The study's lead author, V. Russo, notes that patients treated with Ginkgo biloba and hyaluronic acid for one month experienced a greater reduction in symptoms than patients who used hyaluronic acid alone. The National Center for Complementary and Alternative Medicine notes that this herb may cause an allergic reaction and may increase the risk of bleeding.
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