The Good: Pyrethrins, for the most part, do seem to be relatively safe for most pets, though dosage is still the key. Many on-line sites list pyrethrins as being safe for cats, and as far as we can tell, used judiciously, they are not too much more toxic for cats than they are for dogs.
Yes: Razor bumps will usually go away when you stop shaving. There are a few things you can do to prevent them in the future. Shave in the shower so the heat can soften the hair, and use a shaving gel. Always use a brand new razor, and shave in the direction that your hair grows. Moisturize after shaving.
It has nerves and blood vessels, so it can bleed if itâs damaged, like if you shave over it. Itâs not clear what causes them, but you may get one after a minor injury like a bug bite. These bumps are harmless, but always let your doctor know about anything new on your skin. He can remove it if it bothers you -- it wonât go away on its own.