u/Krawallundremmidemmi

My son has been pretty insulin resistant for the last two days. I thought he was getting sick, but I decided to change his Pod earlier. Now I know why but I can't tell what this is? Is it a bump? Possible insulin bubble? Did it all store underneath the skin and that's why his blood sugar was high for hours and won't come down?
Anyone ever had this issue? Any help would be much appreciated!