oticon Sumo 20DM User Instructions page 13

Possible side effects
The hearing aid or earmold is a custom-made product. If
you are experiencing discomfort, see your audiologist or
hearing instrument dispenser immediately for modification
of the hearing instrument or earmold at the point of
irritation.A hearing instrument or earmold may cause an
accelerated accumulation of cerumen (earwax). Also in
rare cases, the otherwise non-allergenic material may cause
a discharge from the ear, allergic reac-tion, or any other
unusual condition. Please seek immediate consultation with
a physician if these conditions occur.
Children with hearing loss
In addition to seeing a physician for medical evaluation,
a child with a hearing loss should be directed to an
audiologist for evaluation and rehabilitation, since hearing
loss may cause problems in language development,
educational and social growth of a child. An audiologist
is qualified by training and experience to assist in the
evaluation and rehabilitation of a child with a hearing loss.
If the user is an infant, small child or person of mental
incapacity, it is recommended that the hearing instrument
be modified with a tamper-resistant battery compartment.