Tissues can overstretch or excessively contract. Sometimes over-stretching leads to prolapse but not every time. Connective tissues of all sorts are prone to this type of injury. This can be caused by environmental exposure to excess cold (contraction) or heat (expansion). It can be caused by acute trauma. Overstretching can also be caused by cortisol array histio produced by pathogens such as Candida or Proprionibacterium Acne.
Please see the Tighten Tissue Protocol for more ideas about ameliorating this condition.