One of my clients has the hyponychium, the skin under the free edge of the nail, attached to several of her nails. It’s extremely sensitive, and it is difficult to work on her. She wears acrylics and her nails are very long.
The condition that is being described is known is inverse pterygium. This condition has many different causes, including an unusual reaction to acrylic nails. However, there are also some internal or systemic disorders as well as skin disorders that can cause this condition. If the condition and sensitivity persists, I strongly advise a consultation with a dermatologist who specializes in fingernail disorders.