One Year old French Bulldog has itchy bump under chin

My 1 year old French Bulldog has a bump under her chin that seems to be bothering her. It appears to be growing over the past few weeks, getting more red, and she is trying to itch it quite often. I am not sure if it is a zit, wart, ingrown hair or something else but looking for an opinion on what it may be? She does have allergies and the vet prescribed her medicine and a special shampoo for hives she had which seems to be working. Any home remedies?

Hello! You asked for a second opinion - whose was the first?  Technically, when we talk about first and second opinion medicine, we are talking about vets and cases that are passed on in an official capacity.  We do not supply second opinions - or medical first opinion - here.  That's for your vet. You have honed in on the one depigmented clear pink spot, but I wonder about the skin around it, which appears to have at least one other, less clear, pink spot (to the R of it on the photo) and may be generally thickened.  I'm wonder if there is generalised, mild inflammation here - or even demodex or flea bites. Whatever's going on, you say that this is itching and itchy skin tends to lead to secondary infection ( by bacteria or yeast that invades through the skin that has been weakened by inflammation and scratching). Itchy skin (plus or minus secondary infection) is often an ongoing problem that recurrs throughout a dogs' life.  Yeast or bacterial infection is only a secondary feature that occurs when it flares up, eg as a result of too much scratching.  In many cases, skin problems under the chin are brought about by allergy. So what to do?  Definitely show it to a vet, while whatever it is, is still in its early stages.  If infected, vets are increasingly treating with strong antibiotic / anti-yeast in  shampoo form, rather than antibiotics that go round the whole body.  They might feel that the well-demarcated non-pigmented lesion might merit biopsy, eg if it doesn't respond to treatment. Furthermore they may help you to look at underlying causes of the itching.  If allergy, what is your pup allergic to?  Is your antiparasite treatment good enough?  Could it be a reaction to the material of the food or water bowl that the pup is using? - this last is quite a common exacerbating factor and easily remedied. However I would definitely recommend talking it through with them because these conditions can get worse very quickly, especially where infection is involved, and we can't rule out other problems.  If allergy based, it's worth remembering that allergies are lifelong and need to be managed, rather than treated. Best of luck and please let us know how you get on.