baths such as swimming pools, jumping baths and other activities associated with a change in pressure.
Even the shallow end of a swimming bath can be troublesome; barotrauma -- a problem linked to head pressure changes which is affected by catarrh blockages -- can occur in as little as 4 feet (1.2 m) of water depth.
Etymology
The word "catarrh" comes from the Greek "katarrhein": kata- meaning "down" and rhein meaning "to flow."