With 6 kids, I've given 9 CD/T injections so far, and have 3-4 kids with bumps at the injection site, about 1" around, with bare skin and a scab in the middle - a bad ratio! I don't understand it, as I've tried really hard to give the injections subq correctly (22 g 3/4" needles). Do these sores require more than peroxide and triple antibiotic ointment? The vet is coming tomorrow for another topic, and I'm wondering if he needs to look at them. I would rather treat myself. But if they need curettage, I haven't done that myself before. How do I know if they will clear up, or if curettage is required?