Psoriasis lesions are more frequent on the elbows, knees, and scalp. Psoriasis also frequently causes nail changes. Another skin condition that sounds very similar is xerosis. Xerosis is the medical term for dry skin. The guest that asked that question might want to follow-up on a question as to which of those conditions they were referring to.
Children are more likely to get bigger reactions to bug bites.
Typically you may see much bigger bumps at the site of a bite on a child than one on an adult. Also, because children, as a group, spend more time playing outdoors than do adults, they are more likely to be bitten. So, just cleansing will not treat acne. Over cleansing can actually cause irritation. Dry skin has a number of causes.