Try water babies 50 spf by coppertone, keep your baby away from lanolin, wool, fragrances, and dryer sheets. The best moisturizer for your baby is white crisco
This may be a lesion called a dermatofibroma, these result from a bug bite, shaving knick or some other injury that grows some funny healing tissue, they are usually harmless but can have irregular cells at times, or you may be growing a low grade skin ca. Have it cked by a dermatologist