Can I stay active if I have a bad ankle?

Yes, may be limited. Yes. You may have to tailor your activities depending on the condition of your ankle. For example, if it is unstable you may should undergo appropriate rehab/pt, wear a brace, and consider surgery if full course of nonop tx fails. If there is arthritis or DJD you may have to focus on low impact activities. Best bet: see a sports med specialist, get recs re treatment+best activities for you.