My husband was telling me I'm supposed to throw away the razor cartilages you can buy to refill your razor each time you use them.

I have never heard this before,but I use venus brand but the kind the kind you can throw away,the kind you can buy more razor blades.

Back last year I must had shaved down there with an dull razor that I didn't know about but I'm have been experiencing a horrible razor burn that lingers every day, and every day throughout the day and night.

I really don't know exactly how to treat it other than buying some vitamin e lotion since some razors have that on it. I thought about putting aloe lotion.

My question is? Is my husband right? How many times can I use those razor refills before using a new one? I have been using it til I think when it's dull.