Yes.   Steroid injections help to reduce inflammatory chemicals but are known to slow healing.  It does not mean that you should not have a steroid injection and it does not mean that PBM Therapy should not be used after a steroid injection, it just means that the beneficial effects of PBM Therapy could be reduced if you have had a steroid injection.  Symptomatically most steroid joint injections seem to have the maximum reported benefit at about 2 weeks after, so this may well be the length of time that PBM Therapy is not so efficient.