Hi Ezra,
Thanks for reaching out. In general, I think it's best to come out to your parents if you feel you are safely able to do—but I understand that this is not always possible. So, that being said, yes, you do have some options for hiding them. I've listed many of the ones I've tried in this blog post; I've written a few others on the topic as well, which I'll link down below:
https://www.healthyplace.com/blogs/speakingoutaboutselfinjury/2022/3/hiding-self-harm-sca…
https://www.healthyplace.com/blogs/speakingoutaboutselfinjury/2021/9/self-harm-scars-in-t…
The good thing about your scars being fresh is that they might only be a temporary problem; depending on a few factors, you may be able to get them to fade entirely in the near future. I've written a bit about this in another post:
https://www.healthyplace.com/blogs/speakingoutaboutselfinjury/2020/3/do-self-harm-scars-e…
Beyond the options I've listed in my blog posts about hiding scars, I'm afraid I don't know of any other options. In your case, it sounds like makeup MAY be a good bet, if you're able to apply it without tearing up the scabs and interfering with the healing process. (The fact that they have scabbed is a good sign; it means they're healing.) Depending on where you live, the weather may be getting cooler soon—maybe you can get away with long sleeves until they finish healing? Or if you can think of some excuse that would be plausible and match the appearance of your scars (nothing too elaborate, something like falling off your bike or a friend's pet accidentally scratching you), that can sometimes be a short-term solution, though one I'd use only as a last resort.
I hope that helps. If you have more questions or concerns, feel free to reply again here or elsewhere on the blog. I'll be reading.
Sincerely,
Kim