Could just be where he his rubbing on his clothes throughout the day. Moisturising is a good idea for sure, just make sure its not perfumed. If you ask the doctors you can maybe get something on prescription. QV cream is good for minor dryness
We have the same. No ideas what it is. Saw the nurse as our LO also has eczema and was told to use the same cream or any topical moisturiser or leave it...
Do you pump? You could try giving a milk bath with your breast milk, it may help with moisturising and potentially taking care of whatever it may be. Maybe get it checked by a doctor?