What do I say to people that ask about my scars without making them uncomfortable?

People do not deserve anything from you. It is up to YOU whether you want to answer them. If you do want to answer, be honest. If it makes them uncomfortable, they can get over it seeing as they asked.

In my opinion, I think you should just tell them about them. If they chose to ask, then they're putting themselves in a place to feel potentially uncomfortable.

Personally, I am straightforward with my story. In my experience, if they are asking about my scars they already kind of know how the scars got there. I am not usually concerned about making the other person uncomfortable because they don't appear to be worried about making me uncomfortable with the question they're asking. If you would like to be somewhat discreet about your situation, I would say "I've been through a hard time, but I am getting better." That should be enough to stop further questions.

I always tell people my scars tell a story. The story of how I battles things in life....but I'm still standing here because I won. My scars show my past. They don't dictate my future or who I am.

That their battle scars, and it's because I'm a fighter and I'm winning the battle. (That's if you've stoped)

Change the subject, it's nobody's business what you've been through unless you trust them, it was a rough time and you've made it through the fire

Politely say that they're your life story and how you've had your own battles, your scars are who you are and what you've been through, and while it was rough then you can look back and say "I'm a stronger person now" :)

Tell them that they are evidence of your battles. You are not a victim, you are a survivor. In all honesty, those who ask about scars must have a reason for doing so and perhaps they too are experienced enough to know.

Although it can still be a little uncomfortable at times, you can simply say to people that you'd rather talk about something else. However if you do want them to know, it might be best to talk to them privately

If you want to be honest, you can be honest with them. Then you can say something like "I have these scars because of ..." and explain to them why you have them and if they ask further (and you feel comfortable telling them about it) you can explain more. But if you do not feel comfortable telling them about why you have these scars, feel free to tell them "I'm sorry but I don't want to talk about it".