Some Bassets seem to be more prone to these than others. We had one who had a lot but we only did something about them if they grew fast, or were in a difficult place. At one point our vet did a blitz on her and she came home looking like a mail-bag sewn up. We'd kept her litter brother from that litter, and he never had one!! Other than her having a slightly different coat type (heavier) I never really understood why she was so affected and he wasn't.
Of course, given he had everything in the book, our still much missed Frankie also had a few and I have a suspicion that one might have been a 'nasty' as it never really healed after it let go.
Hopefully your vet will be able to sort out what's going on with your lad!
ps We didn't use any shampoo specifically for this but we did use Manuka honey to aid healing if one let go.
Of course, given he had everything in the book, our still much missed Frankie also had a few and I have a suspicion that one might have been a 'nasty' as it never really healed after it let go.
Hopefully your vet will be able to sort out what's going on with your lad!
ps We didn't use any shampoo specifically for this but we did use Manuka honey to aid healing if one let go.