Keloids are a type of raised scar. They occur where the skin has healed after an injury. They can grow to be much larger than the original injury that caused the scar. Anything that can cause a scar can cause a keloid. This includes being burned, tattooed, cut (accidentally or after surgery) or having acne. Asian or African skin is much more prone to keloid scarring, also Caucasian patient on anabolic steroids are at increased risk, for example body builders in a gym.
Keloid scarring can be very unsightly and itchy. Treatment includes steroid injections, which will flatten the scar and improve the itch (several injections 6-8 or more may be required every 6 weeks). Pulsed dye laser to improve the red/purple discolouration and softens the scar. Silicone gel is sometimes recommended.
A keloid scar may be cut out by your surgeon but there is a high risk of recurrence and the recurrent scar might be worse again so this has to be taken into consideration before any decision is made.