Insect bite 20 mon. past staph scalding syndrome

My 20 mon. old has had reactions for 2 1/2 months now, he was in Scottish Rite 2 weeks ago diag. with severe staphallofic? scalding syndrome. Here is my problem one of the Dr. suggested that Joshua had never probaly had reactions to insects it was staph all along, o.k. but I have killed ants and mosquitos on him and noticed the same reactions which are red hot raised about inch dia. all around with small blister clear discharge and they itch.
What do I do, I dont know how to protect him and I dont know really what the cause is.
Pediatrician is trying to fiqure it out but Joshua was misdiagnosed about 6 times before ending up in Scottish Rite.

6/18
first thing that happened was a bite. Went to Dr. Joshua also had a ear infection was given ominicef allergic reaction, 6/19
Back to Dr. given antibiotic augmentin leg would be fine with neosporin.
7/16
virus  again asked about leg told o.k. even if staph o.k b/c looked fine. Given Mupirocin?
7/21
Brother had been sick tested neg. for strep again asked about Joshuas leg, on way home scratch scar open and oozing
7/25
On vac. in Florida at allergist Joshua swollen and hives told to take Zyrtic and given Predisone
7/26
E.R. Joshua skin blistering and  peeling  told that we were doing everything fine  his ear a little red given Augmentin
7/28
Pediatrician diagnosed steven johnson syndrome
7/28
Scottish Rite same diagnosis CDC later diagnosed with ssss severe staph scalding syndrome
7/30
released given cleocin and hydrozine
8/1
I went to Dr. given sulfamethoxazole and hibiclens havent taken sulfa still breastfeeding
8/4
Joshua back to Pediatrician doing everything fine
NOW here we are everytime Joshua gets bite BAD reaction and I dont know what it is and we havent even went outside today and he has a new reaction on his leg Pediatrician doesnt know where to send us
ANY ADVICE??

[jmom3]

Is there a specialist you can be referred to? I know how it feels not to know why thing happen to youy young child and it is very frustrating! Keep us posted, I have never heard of that. He does look like he feels miserable. Poor baby! My prayers are with you and him.