Suggest Treatment For Itchiness In Mouth And Rashes In Throat

Hello sir I am varun I am 23 yr old I have problem in my throat. I am suffering from any type of allergy. i also got a treatment from PGIMS rohtak but there is no use . I have been taking medicines(athromicine, odimont lc & lanzol 30) for past 2 months but there is no relief .i feel itchness in upper part of mouth , rashes in throat and some time yellow patches inside throat ... plzz sugges any treatment, i fed up frm this problem Thanks