How is it that the weather is too hot and wearing sanitary napkins during menstruation causes vaginal itching?

First of all, you must choose pure cotton, which is very important. Your condition is caused by allergies, just because the sanitary towel you are using is not pure cotton.

There are many so-called big brands marked with pure cotton, but it is not necessarily 100% pure cotton, just a certain content of pure cotton. Soft ones are more difficult to choose and more allergic.

Pure cotton will have better breathability, comfort and absorbability, and will not cause allergies.

It is also very simple to judge whether it is pure cotton. If it is not pure cotton, there will be glue dripping down, which is the reason for the glue. Real 100% pure cotton will burn completely after ignition, leaving nothing behind.