I have built up calluses enough to avoid most fingertip pain from playing guitar and bass, but I have rough and slightly cracked fingertips. My fretting hand isn’t bad, but my right hand is very rough from playing the bass:
The cracks are a bit painful (especially when playing), and I have a tendency to make them worse by nibbling at the rough edges. Gently smoothing out the rough edges with a nail file helps, but I’d like to know if there’s something better I can do to treat or prevent this.
I have seen this earlier question about painful fingertips, which has good advice about keeping your fingers dry and your skin clean, but I would like some more specific advice for preventing and treating fingertip damage.