It must be frustrating to have a keloid in places that would make you unable to wear certain clothes.
Do let us know how long this keloid has been, as looking at it, it still looks fairly ‘active’, and I agree that you should consider steroid instillation at a regular basis to reduce the risk of worsening as well as to flatten the lesion.
There is minimal pain really, as I use numbing creams over the lesion before I even do the injection.
Consult your doctor early. This can be treated with intra-lesions steroids and other modalities which they can best advise you on.