I didn’t realise what a nightmare nappy rash is until we went through it. We ended up needing prescription cream from our GP. Since then, we’ve been able to nip nappy rash in the bud before it get bad.
Firstly, do as much nappy-free time as you can. I know, I know - your baby might have accidents all over the shop, but do it if you can because it’s worth it.
At every nappy change, we’d put on anti-fungal cream (Daktozin or Canesten), then a thick layer of Sudocrem, then liberally dust ZSC Powder (this powder was recommended by our paediatrician and it really helps). The prescription cream from the GP gets used once in the morning and once at night alongside the anti-fungal cream.
We add Pinetarsol to baths (anti-inflammatory and antibacterial) and would do multiple Pinetarsol baths a day if it’s really bad.