those that I know who shave say this is very common and is called a razor burn. razor burns happen when a person shaves with out using a shaving cream, shaving lubercant or is shaving with a disposable razor more than once. disposable razors are meant forshort term one or two shavings after that the paper thin blade is too dull to shave with out causing skin irritation that leads to red bumps and pimple like bumps called a razor burn.

my suggestion invest in a shaving cream and a good non disposable razor that you can change the blades every couple shavings or buy the disposable razors in the large quantity packages so that you can throw away one and use a new one every few shavings.

I shave my legs and have discovered they make some really good disposable razors with an indicator strip on it that lets you know when its time to throw out the used razor and start with a fresh one.