Commercial Fixed Wing
Flight Attendant Current
Distraction; Physiological - Other
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Illness / Injury
General None Reported / Taken
Aircraft
Approximately 8 hours into our flight; my ears started to block. I swallowed to clear them; but it came back repeatedly. I spoke with 3 other flight attendants and they said they had the same symptoms. I called the cockpit and talked with the flight crew about the situation. They informed me that everything checked out all right. We were informed about a 'PAC' being 'out' during the Captain to crew; pre-flight briefing.  I questioned  flight crew if this had anything to do with our ears being blocked. Captain told me that the PAC that was out was like having a 'spare tire.' I questioned him because he informed the crew that the temperature in the cabin might be a problem. I asked him if the PAC situation had anything to do with air circulation or filtration; due to COVID transmittal. He said it was not going to affect the pressurization; air circulation or filtration. The ear blockage lasted for 15-20 minutes and didn't return the rest of the flight. Captain asked if we needed MedLink and we declined.
Flight Attendant reported having ear blockage problems during flight and questioned if it had to do with one Pack being 'out.'