What can I do to quickly get rid of a keloid?

Keloid Rx. The safest approach is silicone tape/gel (myscaraway, from walgreens/online), steroid/bleomycin injections immunosuppressant/chemotherapyagent) only in pro hands, electron-beam radiotherapy, almost never excision unless radiotherapy can be guaranteed within 24hr after excision. Be very careful or it will be made worse by cutting it! close follow up for 2yrs+ to monitor for recurrence essential!
See your doctor. Your doctor could either freeze, inject or remove the keloid based on it's specific characteristics.