Kulit baby 4 months melecet

Hi mommies, hari tu i ada post about my son punya body, now today his whole body jadi cmni. I tktau lah bcoz i termakan ketam ke apa ke. Can u guys suggest skin specialist for kids area klang valley. For now i tak pakai any sabun or apa2 lah. Sbb melecet sampai berair. Takot jugak. Pls advise mommies thanks ??