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.
Razor bumps are also referred to as razor burns or ingrown hairs. Razor bumps establish usually on the neck, but they can occur in any location that is shaved such as the cheeks, underarms, pubic area, arms and legs. Razor bumps take place frequently in people who have snugly curled or spiral hair strands.