Welcome to HCM,
Membrane is not formed due to allergy
An adherent membrane is formed during infection with diphtheria
You should get your throat examined by an ENT specialist
at your earliest and take treatment accordingly.
Thanks for trusting Healthcaremagic and posting your query.
Hope you found my response to your query informative and helpful.
If you have further concerns in this regard, you can submit those with Healthcaremagic as well.
With good wishes,