Hello As you describe it might be an eczema Eczema is red, itchy patches on the skin, often seen on the baby s chest, arms, legs, face, elbows, and behind the knees. It is caused by dry, sensitive skin, and sometimes allergies (although it can be difficult at this age to know what the trigger might be). Your doctor can determine if the rash looks like eczema and prescribe the appropriate treatment. In general, treatment consists of: Using a very gentle soap Using a gentle detergent and no fabric softener in baby s laundry Using skin moisturizers Applying a steroid cream (like hydrocortisone or even a stronger one Usually the water make eczema worst so the less u wash it the better . Kind regards