The Royal College of Speech and Language Therapists (RCSLT) has backed a recent study which discourages over-use of dummies in paediatric care.
A spokesperson for the organisation pointed out that a dummy can restrict a child's ability to swallow, which can cause problems.
He explained that children who use dummies regularly can often end up talking from the back of their mouth rather than the front.
This can lead to Ts being pronounced as Ks.
"A baby with a dummy in his mouth has fewer opportunities to babble, which is the foundation of speech and may not communicate with others as readily", the spokesperson added.
He advised parents and carers to interact as much as possible with children, because this will encourage the child to join in and learn words.
His comments were made following research carried out in Patagonia for the BMC Paediatrics journal, which showed that excessive sucking outside on bottles and dummies can cause speech problems.