Yes, you can use Canesten (Clotrimazole 1%) on your 10-month-old daughter for redness and whitish discharge in the diaper area. Fungal infections are common in babies due to moisture from wearing diapers. Apply the cream on the inner and outer labia twice a day, in the morning and evening, and at every diaper change. If you don't see improvement within 48-72 hours, it's best to consult a doctor to ensure the correct diagnosis. The treatment usually lasts for 7 days.