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.
How to Remove Hair Bumps Quickly. Man trimming his beard with an electric razor. If you shave your head, you may develop unsightly bumps on your scalp. These bumps, often referred to as hair bumps or razor bumps, are more likely to appear on individuals with curly or coarse hair. The hair grows back into the skin and results in an inflamed, raised area.