Hi @dustycat52. Your little grandson was diagnosed with immune thrombocytopenic purpura or ITP. It’s a condition where there is a decrease in platelets. When it happens in children, it most often follows a viral infection and is generally a once and done. It can disappear on its own without treatment but steroids is a common medication to get the body back on track.

There are quite a few good articles online. This one from Stanford Medicine is appropriate for your grandson’s age group.
https://www.healthline.com/health/idiopathic-thrombocytopenic-purpura-itp
Do you know if your grandson recently had a viral infection such as the flu, covid, RSV or chickenpox?