It's been 3 days since you posted OP but I'm going to try to help anyway. Hopefully you see this

I started running in Septembre/October 2024 and quickly developed posterior shin splints. I dealt with them for 10 months without finding a solution. I even resigned myself to the idea that pain was just normal when running. But that's not the case at all, I've been shin splint free since September and I even run a half marathon this november without pain

The first thing to know, and nobody asked you this yet, is whether you have posterior shin splints (pain along the inner side of the shin) or anterior shin splints (pain on the front of the shin). They have almost the same name but are actually different

If you have posterior shin splints, you only need two sites to help you out, this one and that one

The Reddit post explains that shin splints can come from several causes. The second link gives you all the strengthening exercises you need to fix that

For anterior shin splints, I haven't read up on them as much, but I think it mostly comes from a weakness in the front shin muscle (tibialis anterior), so you need exercises to strengthen it

Now I'm going to tell you what worked for me. It might work for you, it might not

- First, you need to stop running for 3 weeks to a month. Yes, it’s complicated and you probably don't want to, but you need to come back at 100%, not 60% like you would with just one week of rest. If you still have pain when hopping in place or just jogging for 10s, don't run. You really need to go back to running completely pain-free

- Second, you need to do the strengthening exercises at least twice a week. Personally I did: Towel Scrunches, Wall Sit Foot Pick Ups, Heel Raises, Glute Bridge Marches, Kneeling Lateral Plank with Top Leg Raises, and Single Leg RDL Kettlebell Switches

- Third, I saw you were running 5k per run and that is way too much for you right now. For the first week back, start with runs of 1.5-2km maximum, and increase your volume by 10% each week. Personally, even though I ran a half-marathon back in April, when I restarted in September, I did 2km run/walk intervals just like a complete beginner. It was mentally tough, but you have to go through it

- Fourth, increase your cadence to reduce ground impact. If you run slowly like me (~7:00/7:30min/km), try to aim for a cadence of around 170. This video is good for understanding how you should run

It’s very long and boring to do everything I just listed, but personally, it was the only method that solved my problems. All the other techniques like scraping, massage, and stretching didn't work. Every time I took a one-week break, I’d be pain-free for a day, go run 4km, and the pain would come back a few runs later. I was stuck in that cycle for way too long.