Itchy eyes that occur from consuming caffeine is a sign of a minor allergic reaction. Caffeine is a drug that is quickly absorbed and enters the bloodstream very fast. The chemical passes through the brain and affects your central nervous system. Although caffeine consumption is common through foods and beverages, you need to use caution when ingesting this drug on a daily basis. If your eyes become itchy, red, swollen or watery, stop consuming caffeine until you can undergo an evaluation from an allergist. A severe reaction to caffeine could cause life-threatening complications.
Background
Caffeine is a stimulant drug that enters the bloodstream within minutes of being consumed and is distributed throughout your body. Hours after you consume caffeine, it is expelled from your body in your urine, according to MedlinePlus. Caffeine may be used to treat migraine headaches and temporary may help alleviate being fatigue. Caffeine naturally occurs in some foods, such as cola, cocoa beans and coffee but is also sold in oral and powder form as an over-the-counter medication. Before using caffeine for medical purposes, talk with your doctor.
Cause
Itchy eyes are the result of irritation. When you're eyes become itchy they may feel like they are scratched or contain a foreign object. Scratching the eyes may cause a burning sensation that makes the eyes tear and turn red. Eye irritation from a caffeine allergy is the result of an exaggerated immune system reaction to the caffeine. Because of a malfunction of the immune system, your body releases different chemicals that attempt to fight off the caffeine. These chemicals cause irritation, inflammation and swelling to occur in soft tissues, such as your eyes, nasal passages and lungs, according to the American Academy of Allergy, Asthma and Immunology.
Elimination
Eliminating all caffeine from your diet is needed to prevent an allergic reaction. Even a small amount can trigger a chemical reaction that could lead to eye irritation and other symptoms. Decaffeinated tea and coffee still contain minimal amounts of caffeine that should be avoided. Other food products that you will need to avoid are black tea, green tea, coffee, soda beverages, energy drinks, chocolate and sports performance beverages.
Concerning Symptoms
If your eyes swell, along with lip, tongue or facial swelling, you need to call your doctor immediately. Excessive swelling in the face may be a sign of a severe allergic reaction. Other symptoms that may be related to a severe allergic reaction include hives, trouble breathing, a racing heart and feeling faint.
