Scab on a cat

I've noticed a scab on my almost a year old cat. I have two, but only one of them gets those scabs, they're both indoors and only go outside in a harness in our garden. We recently moved and ever since then she's been getting those scabs but they go away within a week or two, but this one is different then the others she had! I'm clueless as to what it could be, as both my cats don't have fleas or ticks and when they do have ticks they're removed instantly. Thank you for the help!!

Hello!   I'm not sure either.  I have seen fly or midge bites, scratched by the cat, which have led to very superficial erosions like this.  I have also seen flea bites do this and wonder at your confidence that this did not start out as a flea bite:  is your cat on a veterinary strength flea treatment?  If not, the likelihood is that most cats will pick up the odd passenger from time to time and for the most part, owners do not even see them.  Unless it lays eggs and becomes an infestation, or unless the cat is allergic to fleas and therefore reacts dramatically, a single flea that is just 'passing through' would be extremely hard to spot.  Other possibilities include tiny thorns that are then scratched out, or skin cancer (I have no special reason to suspect that in this case), or the sort of day-to-day scrapes that cats get from passing under fences or low sofas etc.  If salt water bathing doesn't help a superficial wound very quickly (and especially if a cat is biting at it) or if they are recurring on a regular basis, then we would advise a vet visit to get it checked.