It was very red. My bottom tried everything, we even used diapers. We …

It was very red. My bottom tried everything, we even used diapers. We got size S for 4-8 kg. The bottom passed, I smeared some Levomekol and Sudocrem. Plus these diapers. Everything went well, although it took a long time. Then we bought MuNi too, also there. Only for Zhenya C and M 6-11 kg And the bottom started to turn red again. I don't know how this works, maybe I just think that the size of the diaper is slightly smaller than a day, although it's the same company. In short, I don't know what to do.