Neymar has failed to score for Barcelona since mid-February as his form has suffered following the controversy surrounding the details of his move to Camp Nou.
Barca president Sandro Rosell resigned after it was revealed the forward's father was paid €42 million as part of the deal that saw him move to the club from Santos last summer.
But Romario has taken to Twitter to offer is support and insists his recent struggles on the pitch are nothing more than a minor blip suffered by even the greatest of players.
"In my opinion, every player has good and bad phases, it's not only the case with Neymar. I would give him this advice: have attitude and always leave personal problems off the field," he said.
The 48-year-old, who scored over 300 goals in nearly 450 appearances in his professional career, has also called on the 22-year-old to learn from his Blaugrana team-mate Lionel Messi.
"Currently, he plays alongside one of the world's best [Lionel Messi] and can learn a lot from him. I was "the Messi" of my era, other players would have liked to have learnt from me.
"I'm sure Neymar will go much further in his career and he'll give joys to the Brazilian fans."