If eyelash extensions are not applied to one single natural lash at a time several problems can occur. If the extension is applied to two or more natural lashes they cannot grow properly as they normally would. This can result in the natural lash becoming bent or broken. The lashes are also likely to feel uncomfortable, often with a pulling or tight sensation along the lash line. Extensions that are too long or heavy for the clients natural lashes, can result in premature lash loss. Either or both of the above methods can result in premature lash loss and damage.