What is the cause and treatment for keloid?

Million $ question: The answer to this question has eluded investigators for hundreds of years. Keloids are an excessive and uncontrolled healing response to injury that results in fibrous scar tissue that extends beyond the limits of the initial injury.

We don't really know: Why someone gets a keloid. There needs to be some sort of injury or reason for irritation in a person with that tendency. Treatments include, steroid injection, pressure therapy, excision, and radiation. Discuss this with a dermatologist or plastic surgeon.