Abnormal
It is usually an abnormal phenomenon when a hamster's eyes turn red, and it may be caused by various reasons. The following are the common causes and treatment methods:

1. Eye Diseases
Conjunctivitis or keratitis is a common cause of red eyes in hamsters, manifested as eye congestion, increased secretions, and even swelling of the eyelids.
Treatment method: Clean the eyes with normal saline and drop antibiotic eye drops (such as levofloxacin or tobramycin).
2. Environmental Stimulation
Staying in an environment with strong light and a lot of dust for a long time, or using inappropriate bedding materials may irritate the hamster's eyes and cause them to turn red.
Treatment method: Replace the bedding, keep the cage clean, and avoid using cat litter or bathing sand with dust.
3. Dietary Problems
A monotonous diet or excessive intake of high-fat foods may cause the hamster to have excessive internal heat, leading to red eyes.
Treatment method: Adjust the diet, increase light foods such as vegetables and fruits, or feed mung bean soup to reduce internal heat.
4. Trauma or Infection
Fighting or scratching the eyes by hamsters may cause trauma, which can then lead to infection.
Treatment method: Clean the wound, use antibacterial eye drops or ointments (such as terbinafine or ketoconazole), and if necessary, put on a neck collar to prevent scratching.
5. Other Reasons
Some hamster breeds are born with red eyes, which is determined by their genetic genes.
If the red eyes are accompanied by severe symptoms (such as a large amount of purulent secretions or inability to open the eyes), it is necessary to seek medical attention in a timely manner to avoid developing into sepsis or necrosis of the eyeball.
Preventive Measures
Regularly clean the cage and replace the bedding and urine sand.
Avoid feeding high-fat and high-calorie foods and maintain a balanced diet.
Regularly check the hamster's eyes, and promptly detect and deal with any abnormalities.
If the hamster's eyes remain red or the symptoms worsen, it is recommended to consult a veterinarian as soon as possible to avoid delaying treatment.