What's the difference between scar tissue and keloid? can ultrasound be used to reduce both? are there any other ways to get rid of it? what can i do?

Scars/ keloids: A keloid is a raised scar that grows beyond the original cut. The most common places for it are the earlobes and chest. Scar tissue is a normal part of the healing process. Keloids can be treated with steroid injections, silicone dressings, pressure earrings, and surgical excision with radiation to reduce the risk of recurrence. See your dermatologist or plastic surgeon to decide which treatment.