why my bra causes itchiness?

my friend is aking me to write an article on how to get rid of the itchiness caused by bra. i don't go with the idea because in the first place you should not buy the bra that gets you into discomfort.

If your bra causes itchiness, most probably is because the fabric of the bra does not suit your skin.

The cotton and silk are always the safest one. and when there are lace on the bra, double check whether they are made of different fabric. however, since we are no experts in fabric or bra, here is the simple way to test the bra: feel the part of the bra that will directly touch your skin, whether it's hard or rough. Try the bra on and move it around. If by simply doing so your skin is getting red or uncomfort, drop the bra! no matter how sexy it looks on you!

another reason, very slim chance, it might not be the quality of the bra, but the washing liquid you are using to wash the bra. so just change the brand and the itchiness will be gone.

Hmm, the third reason is that some people don't wash or change bra often. what should i say about it? Don't be lazy!!