Hello and hope you are doing well.
To clear the Eustachian tubes, decongestants, steroid nasal sprays and antihistamine medications are used. If the Eustachian tube dysfunction, does not resolve with medical therapy, then surgical options are the choice of treatment. Myringotomy, where a tiny slit is made in the eardrum to aspirate any middle ear fluid and to allow temporary ventilation into the middle ear space. Pressure Equalization Tube, PET, where a tiny plastic or metal tube, is introduced into myringotomy to keep the portal open.
Try to avoid flying until the blockage is cleared. Discuss this with your doctor.
Hope this helped and do keep us posted.