Scabies Or Skin allergy

Hi.  Last year  suffered from  skin rashes which were very itchy on consulting  doctor diagnosed scabies and my treatmen was successfull, however about a  month back same thing happend tha Doctor said its insect bit bt treatment responded a bit tha again i used scabicide nd Ivermectin which gave better resulst bt nw again same icthy rashes are irritating me... Any solutions pleaes???