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.
Will an ingrown toenail go away on its own? Ingrown toenails occur when the side of the nail becomes curved and invades the skin along the side of the nail. This can cause increased redness, pain and swelling to the skin on the side of the nail. Ingrown nails do not usually go away without cutting the ingrown out. However, in some cases, an ingrown toenail can go away on its own if you trim a small piece out of the corner. This would be for a minor type of problem. Use a clean instrument.