Hello and welcome to hcm forum,
The mucosal thickening of maxillary antrum,is due to the invasion of tissues underlying.
Surigcal treatments has to be done depending on the condition.
The thickening may be due to congenital or traumatic occurence.
Avoid too much stress
Maxillary antrostomy has to be done if required.
Please avoid occurence of sinus
Antibioics can be taken after consulting a physician.