A sudden blood clot appeared on the white part of the eye.

A sudden appearance of a blood spot on the white part of the eye may be caused by trauma, acute hemorrhagic conjunctivitis, pterygium, or other reasons.

1. Trauma

This may result from pressure or impact that damages the capillaries in the eye, leading to bleeding and bruising. If there is no pain or vision loss, initial management typically includes cold compresses within the first 24 hours, followed by warm compresses after 24 hours to promote absorption of the blood and relieve symptoms. However, if vision is affected, prompt medical attention is necessary.

2. Acute Hemorrhagic Conjunctivitis

This condition may arise due to infection or allergic factors causing acute congestion of the conjunctiva, resulting in acute hemorrhagic conjunctivitis. Management generally involves proper isolation, maintaining good eye hygiene, and following medical advice to use medications based on the specific infectious agent. In cases of bacterial infection, antibiotics such as tobramycin eye drops, levofloxacin eye drops, or neomycin eye drops are commonly prescribed to eliminate bacteria and improve symptoms.

3. Pterygium

Prolonged exposure to sunlight, dusty environments, or poor ocular nutrition may lead to abnormal tissue growth on the bulbar conjunctiva at the interpalpebral fissure extending onto the cornea, resulting in pterygium. Common treatments include surgical options such as simple pterygium excision or pterygium excision with conjunctival flap grafting, which remove the growth and help prevent recurrence.

In addition, systemic conditions such as hypertension may also contribute. Timely treatment can help slow disease progression.