Why does my 10-week-old kitten have small pimples on its skin?

This is most likely due to some type of allergy. Due to its location it is most likely fleas but could also be due to something else in the environment. I would make sure she is on a high quality flea preventative like comfortis, cheristan, or advantage. Also, if you see any fleas on her I would also treat your house and yard for fleas. Fleas do not live on the pet but in the environment. If you do not see any fleas and the spots are not improving, I would recommend to have your vet take a look at them. There is a good chance that the spot have become infected and she may need some antibiotics and stronger allergy meds like steroids to help them heal. I hope this helps!

It is possible that Proust is having an allergic reaction or allergy causing the little pimples. The 3 types of allergies in young cats are food, environtment or flea. I recommend applying flea prevention every 30 days. You can try to use glass feeding dishes that you clean often and avoid cat food with fish or beef in it. If Proust will let you, you can try to give him a medicated bath too. However if this is not improving I recommend taking him to the vet for a good exam. It is possible the pimples are infection and need antibiotics to resolve

This could be a pustule which is a local bacterial infection or even a small cyst. If it is just one it may go away on its own. But if there are multiple, this one becomes larger or seems painful your cat may need medication from your veterinarian.

It is likely a solitary pustule or papule. These can be commonly seen in puppies because their immune system is still developing. If it is just 1 pimple, then I would not be too concerned and would just monitor for now. However, if this starts to spread, then its best to take Onex to your vet for medications to help resolve this bacterial infection or allergic skin disorder. Best wishes with Onex.

This looks like a mild skin infection. I suggest you use these medicated wipes on the affected area once a day. If no improvement in 7-10 days then Pepper should be examined by your vet. ( https://www.allivet.com/p-5393-douxo-chlorhexidine-3-ps-pads-for-dogs-and-cats-30.aspx )

This is probably caused by an allergic reaction. first of all make sure you de-flea Pixie regularly every month with a high quality spot on (ex. Advantage) as fleas are by far the most common reason for these reactions. If the fleas are not the problem, it could be an allergic reaction to food or an environmental factor. this is more complicated to treat and will sometimes require medications such as Steroids, anti histamines or cyclosporin in order to stop the allergy.

Poor Gaston! Feline acne is pretty common, and it sounds like you're already taking all the steps to help minimize it. That said, if this new blemish is different from previous ones, bothersome to Gaston, or growing in size/hot to the touch, it's a good idea to have it checked out by your vet to make sure it's not something else such as an abscess (infection under the skin) or cyst. Otherwise, keeping the area clean and dry and monitoring the spot for any changes can help keep it from becoming more irritated.