6 year old herman male

by ellie mac
(wigan)

can anyone please advise me why my tortoise nose at top has got a dent in it,just over his nostrils ,and small part gone light brown,, he,s always banging with his nose,,can this do it?? hes happy,,eating ok,,but i noticed his shell gone duller, he eats salad from the bags in winter,,as there r no wild weeds growing yet,also i sprinkle nutrobol on his food a few times a week,, he hates water,, but i bath him every 1 to 2 weeks,,he dont like it,,but it has to be done,,thanks a lot in advance
ellie