👉 Cystidia is a condition in which small, round-shaped yellow or blue blisters form on the skin. These blisters are often found on the eyelids, nose, and cheeks, but they can also appear on other parts of the body like the lips, chin, and ears. Cystidia can be caused by various factors such as genetics, infections, and environmental factors. They are often accompanied by itching, pain, and sometimes a burning sensation. Treatment for cystidia may include topical