Deficiencies in vitamin B2 (riboflavin), B6 (pyridoxine) and amino acids Histidine, lysine or phenylalanine may also bring reddened eyes. Other causes of reddened eyes include inflammation and eye infections that cause redness, itchiness, pain and vision problems. While the reddened eyes can occur at any time of the day, are sometimes more prone them after certain activities or after a long day of exposure and irritation. Possible causes of reddened eyes * sleep/sleep/deprivation sleep apnea * Alcohol (usually as a result of interrupted sleep and/or a hangover) * food and diet * cosmetic products used at night * decreased secretion of tears in the night * environmental toxins * sun exposure * Tension/abuse * fatigue * cigarette smoke * chemical fumes * abuse of other possible causes of reddened eyes contact lenses * blepharitis * conjunctivitis * Ulcers and infection of the cornea * corneal Abrasion * Diabetes * bodies strangers in the cornea and the conjunctiva * ocular laceration and intraocular foreign bodies * Uveitis * blood clots reducing drug * Tension and anxiety * catarrh and flu * allergies and hay fever * pregnancy * problems of kidney kidney stones * liver disease * blood pressure high/hypertension * glandular fever * menstruation/menopause * mumps causes of eyes reddened in infants and children often infants and children may have reddened eyes for the same reasons that make it the adults. However, babies and children do not know sometimes that should not rub your eyes, which can make the condition worse, nor can vocalize when they are experiencing itching or discomfort. Ear infections, dehydration and even artificial heating may be guilty. Be sure to supervise additional symptoms, and when in doubt, consult your child’s pediatrician. The infections are especially problematic for children in day care or school, since they are easily transmitted to others during close physical contact. While it is extremely rare, Kawasaki disease, which involves inflammation of the blood vessels, can occur in children about 19 of every 100,000 in the United States.