* Se cadi sette volte, rialzati otto: (If you fall seven times, get up eight.) This is a similar proverb, emphasizing resilience.
* Non mollare! (Don't give up!) This is a more general encouragement.
* Forza e coraggio! (Strength and courage!) Another general encouragement.
* Riprenditi presto! (Get better soon!/Recover quickly!) This focuses on the recovery aspect.
The best translation would depend heavily on the situation in which the phrase is used.