Kenny Dalglish, the manager who brought Luis Suarez to Liverpool in 2011, has urged the club to stand by him again.
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FIFA has banned Suarez from all football for four months after he was found guilty of biting Italy defender Giorgio Chiellini -- the third time he has been banned for a biting offence.
Dalglish believes the player -- who he strongly backed him after he was found guilty of racially abusing Manchester United's Patrice Evra -- needs help to address his problems and said he was confident Liverpool would not turn their backs on him.
Writing in the Daily Mirror, he explained: "It is my belief that, when you bring a player to a football club, he becomes your responsibility. You don't just turn you back on a player because he has done something wrong.
"I think you will find that Liverpool will not turn their back on Suarez, whatever the ban FIFA have decided he must serve.
"You can't really ask any one person why what happened against Italy happened, because there is only person who knows and that is Luis.
"Some people have injuries you can't see. Sometimes, when people have something wrong with them, just because they don't have a plaster cast on their leg, people think they don't need help."
Dalglish added that he felt the ban meted out to Suarez was harsh on Liverpool because the striker had not been representing them at the time of his latest bite.
"When he was punished by the FA for the biting incident with Branislav Ivanovic [in 2013] and banned from domestic games, he was still allowed to play for his national team," he wrote.
"It seems a bit strange, then, that when he is banned for something he did with his national team, his club has to suffer too."
Dalglish's call for Suarez to be offered professional help echoed that of the European players' union FIFpro, which said proper treatment should have been included in his punishment.
In a statement, it said: "Luis Suarez should receive all the support he needs to deal with any off-field issues he may be experiencing at this time."
And FIFA secretary general Jerome Valcke said Suarez "should do something for himself" because the bite was not a one-off incident and "it is definitely wrong."
"I think he should find a way to stop doing it. He should go through treatment," he said. "If it's the first time, it's an incident. If it starts to be more than once, it is not an incident. That is why the sanction has to be exemplary.
"I do not bite Walter [de Gregorio, the FIFA communications director] when I am unhappy with his work. That is not what you do in life. Why should it happen on the pitch?
"It is not Liverpool who have been punished. It is the player who has been punished. They took into account the past behaviour of Luis Suarez. They made a decision based on the evidence of what Suarez had done."