Hi..thanks for your query
Certain people are chronic carriers of the bacteria staphylococcus aureus
and require a long term management to eradicate the bacteria from the sites of colonisation . This is frequently achieved by topical antibiotic
medications which are given for slightly longer application than is usually prescribed for skin infections.
Children are frequent carriers of the bacteria and it is possible that your son needs a therapy to eradicate the same .eczema
is a condition where the skin barrier is breached and it becomes easy for the bacterial invasion to occur.
You can ask your husband to test for Diabetes
.it can be followed up by a GP or a dermatologist
Hope this helps.take care!