“xiu xi xia” means take a break,but i think the meaning of“jiu hao le”depending on the context. take a break and then go on，or take a break to refresh yourself,or take a break and you will be fine,ect.

sb will be alright or fine or recover from sth after taking a short break or a rest

it means "have a rest and then you will feel better~" that's all.

"xiu xi xia jiu hao le" inChinese is“休息一下就好了”。in English is“take a rest”

have a break and it will be fine!