Why is your palate swollen on one side and painful?

A swollen and painful palate on one side may be caused by several factors, including an infection, such as a dental abscess or viral infection, or irritation from an injury or allergic reaction. Conditions like oral herpes or canker sores can also lead to localized swelling and pain. If the symptoms persist or worsen, it's important to consult a healthcare professional for a proper diagnosis and treatment.