Hello,
Redness in eyes is caused by various conditions.
Some causes are
1. Environmental factors like dry weather conditions, exposure to harsh sun, chemical fumes and smoke and dust.
2. Medical conditions like Eye infections, inflammation of the eyes and corneal scratches
3. Lifestyle factors like improper diet, lack of sleep, excessive alcohol consumption, excessive use of cosmetics and regular
smoking.
Apart from the red eyes, do you have any additional symptoms like swelling, dryness in the eyes,
sneezing or cough, discharge of mucus or pus and eye twitching. do you have headache,
neck pain and even stomach pain.
Treatment depends on underlying cause.
if it is due to allergies, then
anti histamines will be helpful.
if it is due to environmental factors, then is better avoid such environmental conditions.
if it is due to eye diseases, then it is better get treated.
Thus you first have to rule out any eye diseases , by proper Ophthalmologist examination and follow as per his advice.
Hope this helps.
Please write back for further queries.
Wishing you good health.