it's called frenulum breve, and it's not uncommon.
to fix it, you don't even need the steroid cream. regular stretching will loosen the tight frenulum. just gently pull on it, taking care not to rip it, several times a day, for several minutes. I say take care not to rip, because if you do, you need to stop all sexual activity, including masturbation, for a couple of weeks until it completely heals.