Why would the eyes turn yellow and swell after one beer?

It's highly unlikely that your eyes would turn yellow and swell after just one beer. This sounds more like a symptom of something else entirely.

Here's why:

* Beer itself doesn't cause yellowing or swelling of the eyes. Beer is primarily water and alcohol, neither of which have those effects.

* Yellowing of the eyes (jaundice) is often a sign of liver problems. If you're experiencing this, it's crucial to see a doctor immediately.

* Eye swelling can be caused by a variety of factors, including allergies, infections, or even just lack of sleep.

It's important to note: If you're experiencing any unusual symptoms, it's always best to consult a medical professional. They can help determine the cause of your symptoms and recommend the appropriate treatment.