What do you suggest for my 16-month-old's red, cracked thumb
Your daughter's condition is common among thumb suckers. Repeated cycles of moisture followed by evaporation of that moisture results in excessive drying, redness, and cracking of the skin. Obviously, the ideal "treatment" of her condition will occur naturally when the thumb-sucking behavior comes to its natural end. In the meantime, keep the thumb well moistened with a thick moisturizing cream (which might be more helpful than a lotion), and be sure to see her doctor if there are any scabs, oozing areas, or pus bumps, which could represent secondary infection with bacteria or yeast. You could also give her a pacifier as a substitute for her thumb, later on gradually weaning her from its use.