When worn properly, your clip-in extensions will not lead to balding or hair loss. However, it is important to understand that clip in extensions are for temporary wear only. They are not designed to be worn permanently, as this can damage hair follicles. For that reason we advise our customers to take them out before going to sleep to avoid such damage.If you have very fine hair or if you are suffering from a hair loss condition, such as alopecia, we do not recommend you wear extensions unless you have consulted with your doctor. While clip ins do not cause any damage to your hair, alopecia is a special case that does not react well to the additional weight of clip ins. If clip ins are not right for you, try our fabulous collection of wigs that are available in human and synthetic hair, for the most natural look!