Defined Reddish brown mark on finger nail

[nh_user_1268431]

i made a post about this before but basically i first noticed this mark xmas eve and since then its gotten bigger and changed shape slightly. ive been told it might just be nail damage (I pick my fingers a lot) but Im concern it might something worse. [image](https://community.patient.info/uploads/default/upload-sm/upload-sm/1