Eye infections caused by expired makeup can be quite unpleasant and potentially harmful. It's essential to understand the symptoms, causes, and treatment options to protect your eye health.

Symptoms:

1. Redness: The eyes may appear red or bloodshot, which is usually a sign of irritation or inflammation.

2. Discharge: There might be a clear or colored discharge from the eyes. This could be a sign of bacterial or viral infection.

3. Swelling: The eyelids or the area around the eyes may become swollen and tender to touch.

4. Itching: There might be a constant urge to scratch or rub the eyes.

5. Pain: Depending on the severity of the infection, there might be a sharp or dull pain in the eyes.

6. Blurred Vision: In some cases, the infection might affect the clarity of vision.

Causes:

Expired makeup can harbor harmful bacteria and fungi, which can cause infections when they come into contact with the eyes. This is especially true for products like mascara, eyeliner, and eyeshadow, which are applied close to the eyes. The preservatives in makeup that are designed to keep these microbes at bay lose their effectiveness over time, making expired makeup a breeding ground for infection-causing organisms.

Treatment:

1. Stop Using the Product: The first step is to stop using the expired makeup product immediately.

2. Cleanse the Area: Cleanse the eye area gently with a mild, fragrance-free cleanser to remove any residual makeup.

3. Visit a Healthcare Professional: If the symptoms persist or worsen, it's crucial to visit a healthcare professional. They might prescribe antibiotic or antifungal eye drops or ointments to treat the infection.

4. Rest and Hydrate: Resting the eyes and staying hydrated can help the body fight off the infection.

Prevention is always better than cure. Always check the expiration date on your makeup products and dispose of them once they're past their prime. Also, remember to clean your makeup brushes regularly to prevent the buildup of bacteria and fungi.