"Je pense que tu as besoin d'un avis médical."

Translation: I think you need a medical opinion.

[DaveGarrar]

why not: I think you need medical advice?

[TrishyV]

medical advice - it's the same thing!

[A2KkjUuV]

I would say it's even a better translation!

[BrianBoru4]

In a medical context, not exactly -- see comment by Martyn413385 below.

[Martyn413385]

To be fair to Duo, the meaning of "avis" is "opinion". The French for advice is "conseils". They don't mean the same thing in either language.

[Crotchet]

Thanks for that; it is easy to forget that a word that is similar to the English doesn't necessarily mean the same.

[TanNguyenc3]

It's rarely to use "a medical opinion" in medicine and healthcare center, "medical advice" is often much more used, I think...

[Martyn413385]

Opinion and advice have quite different meanings in English. A "medical opinion" would be to provide information about analysis/diagnosis/prognosis relating to a medical condition. eg "I think you are suffering from flu". "Medical advice" would be what to do about the condition, eg "Take two aspirin and go to bed early."

[BrianBoru4]

That's a good distinction, but in a medical context 'opinion' can be used more widely. A doctor can make a diagnosis and recommends, say, an operation. The patient might accept the diagnosis but want to explore alternatives to an operation: they would still say 'I want a second opinion on the need for an operation'.