Razor bumps, like climate change will evoke different 'cures'. Ask 100 people the cause of climate change and you'll get 100 different answers. My 'cure' for razor bumps is Kiehls Razor Bump relief. Now unfortunately, the idiots discontinued it last year, but you can still pick up the odd one (it's replacement is nowhere near as good!)
The Kiehl's (owned by L'Oreal since 2000) merely had a form of salicylic acid as its main bump controller and that can be bought much cheaper in a local drug store/pharmacy such as this one which will work just as well and probably better. Never mind the "Anti-Blemish" label as salicylic acid works wonders on many ailments.