8 months baby, rash between eyes base reddish and top looks waterish white, itches.

Can't really say: Skin issues often require visual exam to even begin to assess. We can only see what you have written (no photos) . Since the description is minimal at best, you likely need to see someone & have this examined. No rush.

Possible contactderm: A pediatric appointment is suggested. Use no soap or products on the face. A small amount of 1% hydrocortisone twice daily may be used sparingly until seen.