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Peeling skin, darkening around mouth, especially when associated with drying of skin on other parts especially on face, forehead can mean dermatitis of various causes like atopic, irritant. Epiceram is a cream containing non steroidal skin barrier emulsion and is very useful in dry conditions of skin due to various causes. Desonate is again a steroidal topical cream useful in many skin conditions.
If you are experiencing ulcers or bumps in mouth, then we need to rule out other conditions like Behcet's disease or viral infections like Herpes. Please consult your doctor again to discuss these and get investigated accordingly. Thank you.