Baby rash

Heather
Hey guys, just trying to get some other opinions on a rash my LO has. He's had it off and on for a while. It seems to only really be in the diaper area. He has a few bumps scattered on his chest and legs but like maybe 3. He's always had rougher skin (you can see in the chest pic) and the dr said he has eczema. He's never had any skin irritations other than this random rash. We've tried everything and found no difference so far. We're right now only using organic lotion soap diapers and wipes to see if it helps but still nothing. One of the other Drs I saw said he'll have a rash when he's got a cold which he has had off and on for months now. I just don't feel it'd be in the diaper area. Any opinions would be greatly appreciated!