I bet this topic's been done to death, but just wanted to get some ideas for how to deal with these just in case they come back now I'm switching from pockets back to a two part system. DS had awful whelts that just didn't heal and I thought was related to the bindings on the ME wraps. Thinking back now, he couldn't have been allergic to them or he'd have had the marks on his waist too, but I switched to WN wraps anyway - which use elastin rather than a latex based one - as it was queried during a hospital admission whether he was allergic to latex.
Well, he'd had a break from reusables at the time due to the query about the allergy so the marks had healed up. I started using pockets in the day and WN wraps at night. The marks eventually returned though, although it did take longer as he was only using them at night.
Now I'm wondering if it was the style of wrap - WN and ME Airflow are a 'baggier' design - so the bindings tended to sit on the legs and not in the groin area. I'm going to try a BB Minki wrap now as it's more fitted. One of the ladies on my other thread recommend 'Tykies', but I wanted to check out what other things might be causing this and/or how to stop it happening?