Nasolabial folds, also known as ‘Smile Lines’, are deep-set wrinkles which form along the side of the nose and continue downwards to the corner of the mouth. Deepening over time, nose to mouth lines appear as the facial skin and supportive structures of the cheeks become weak due to ageing. Repeated smiling also makes these lines more pronounced. Smile lines are normal and an inevitable sign of ageing skin, but they can cause the face to look old and tired, adding years to your appearance.