Police are looking for a man who has been seen doing star jumps dressed "like a smurf".
They have received several reports of someone "acting suspiciously" while wearing a blue skin-tight suit and blue make-up.
Gloucestershire Police are appealing for information and they want to speak to the man to establish his motives.
They are concerned he may have been following women in the Forest of Dean area.
The incidents took place in May Hill in Longhope in broad daylight on Sunday May 20 and Saturday June 2.
A police spokesman said: "One witness told police the man was dressed in a blue skin-tight outfit, had blue paint on his face and looked 'like a smurf'.
"He has been seen waving at women and doing star jumps while running up to them."
Police said they are urging the man or anyone with information about the incidents to call 101, quoting incident 192 of June 2.
Information can be also given anonymously to Crimestoppers on 0800 555 111, or via www.crimestoppers-uk.org.