Rio, it went away for me. I cut for a number of years as a teen and never told anyone. No one ever guessed, I kept it hidden. It helped me cope back then. Then I outgrew this behavior and instead reacted to stress and pain in my life differently. I have not cut for over 20 years. I handle my problems and stress in other ways now, perhaps not very functionally, but at least not physically self harmful.

15 months is great! Keep going. If it helps to wear a hat, then go for it.