Concerns have been raised over the streets of Hounslow "rapidly becoming a brothel-infested borough".
The fly-posting of massage service mobile numbers advertising what appears to be sexual services is "a serious issue" escalated by the number of minors who can see them.
The worrying message comes after a resident walking with his nephews aged nine and 13 noticed an alarming number of lampposts and streets signs littered with massage parlour adverts.
Sightings have been reported along major streets including the High Street, Lampton Road and Great West Road.
The recent rise has brought about fears the borough has a problem with brothels and prostitution.
The resident who did not wish to be named, said: "We appear to have a major issue with brothels and street prostitution which has for sometime been undressed and hidden.
"All along the high street there are fly-posters for 'massage parlours' attached to every bit of street furniture.
"As a resident I find it an unpleasant sight.
"I acknowledge work is being done but on a daily basis we have to live in what is rapidly becoming a brothel-infested borough."
In recent days, following numerous complaints to the council, some posters have been removed in certain areas.
He continued: "I noticed that the council has removed the fly-posters from outside main tube station and on some (not all) of the main street signs in the pedestrian High street area.
"However, there are plenty of adverts for "massage" parlours on other lamp-posts."
Hounslow council have been approached for a comment.
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