i cant use pads either. i use a brand of period underwear that absorbs my menstrual cycle. i dont have if for more than 4 days, so im very lucky like that. i am not sure of the name but i found them on amazon. hope you find a solution.

Have a look 👀 at these then ladies they are on eBay maybe 🤔 these could work out for you
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Maybe you can try wrapping the pads with cotton t shirt material?

Mine don’t have blue lines. No telling what some companies put in stuff. I bought some Walmart T-shirts that made me itch and skin crawl all over even after washing. Washed them a million times and every time I put those particular shirts on my skin crawled and itched. Found out they sometimes soak clothes in formaldehyde so they won’t mold in transport in oversea shipping containers. Found out I had to use full fat powdered milk and soak it in washing machine many hours to remove it as something in milk protein breaks down formaldehyde and then the itching stopped. So a person never knows what these corporations are doing. Had to go to special organic natural laundry soap too because many companies put undisclosed formaldehyde in laundry liquid, even the free and clear ones.

My gynecologist told my some pads that have the blue lines can cause a rash. Always is one of them. Hope this helps.