My wife has suffered with ear problems during descent all her life. One of my AME's suggested using nasal decongestant drops at top of descent and although that helps, it doesn't fix it. After many years to trying "remedies" she now uses a well-known type of ear-plug which is readily obtainable from pilots' shops and duty-free pharmacies. She still gets slight problems, but doesn't bang her head against the seat in front with pain..