it hasn't healed up on its own so far
it doesn't sound like it will get better on its own if you are having ear cartilage pain.
swimming in the ocean is not bad
but if you get water in your ear, the bacteria in your ear canal can cause a bacterial external ear infection when water is trapped in your ear canal.
that sounds like what has happened.
let me know if you have other questions.
if done for now, you need prescription antibiotic ear drops to clear this infection.
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