Think about getting older and getting weaker. Eat less soy sauce. When my son was 2 years old, he accidentally hurt his forehead and left eyelid, with traces but no seams. Up to now, over the past few years, the scars are still there, but they are not obvious without careful look, and they are a little faded. As for what will happen to scars in the future, it is also related to physical fitness. Some people have the constitution of scar hyperplasia, and the scar will be more obvious and even gradually proliferate. Now the plastic surgery technology is still very developed, so don't worry too much.

PS, you must have misspelled the diameter of 3m. 3m is 3 m. It's impossible. If there are pinholes within 3cm, there may be some traces. But don't worry too much. You can consider seeing a doctor when you are old. It's too young to develop well, so the doctor probably won't agree to trim it.