Madam before answering your question I have some additional query
1.Where do you live?Because some disease are prevalent in some specific area,especially some zoonotic diseases(by mouse,flies,mites etc)
2.what is the nature of the rash?is it itchy?is it associated with fever?
are the blisters painful and itchy?is their any cough?
3.Do your husband have any underlying medical condition like diabetes,
hematological malignancy etc.?
Treatment suggestions are as follows
1.Take antibiotic like co-amoxyclav(625) three times a day for 5 days and doxycycline(100) for 10 days.
acyclovir(400) thrice a day for seven days can be tried if it is confirmed as
chicken pox.
2.Take levocetrizine for itching.
3.Use topical
emollient cream,it will be helpful
4.take
ranitidine (150) before breakfast at empty stomach.
5.test for blood sugar,liver function,
complete blood count,esr.do a chest xray.
a picture of the rash will be very helpful.
thank you