Aim. To assess the incidence of otorrhoea after swimming in patients w
ith grommets in situ, and discover whether protecting the ears from wa
ter affects this occurrence. Methods. A group of children with bilater
al patent grommets were allowed to swim with head under the water with
one ear protected, and the other unprotected from water entry. Using
a calendar system, each swim was recorded and each episode of otalgia
or otorrhoea occasioning medical consultation was recorded with the ou
tcome of the consultation. Results. Nineteen children completed the su
rvey taking a total of 551 swims with head immersion. One child suffer
ed bilateral otorrhoea one day after a swim. There were three episodes
of otalgia sufficiently severe to warrant medical consultation. Two o
ccurred in a protected ear and one in an unprotected ear. On each occa
sion there was no evidence of infection. Conclusions. There appears to
be a low incidence of otorrhoea during summer in children who swim wi
th grommets in situ. There is no evidence that protecting the ears fro
m water entry confers any benefit as far as preventing infection in co
ncerned.