Suggest Treatment For Puss Oozing Keloid On Chest

My wife suffering with keloid on chest area. the size of keloid is 30mm radius. Now the keloid infected and pus is comming out and what we will do now age 37 years height 5.4 feets weight 76 kgs one year back he had taken steroid injection and now she is using amoxiliny capulse 250mg with anti septic cream