When you’re washing an item at home in the washer there is always a possibility that a thread may come loose over time and unravel. This can be a gradual process or can happen the first time an item is cleaned. The exact same logic should be applied when an item is sent to the dry cleaners. Once the cleaning process begins there is no way ensuring a loose hem/seam will hold its position. Common areas where the hem/seam may be affected are inner leg linings, underarms, or on the edges of items containing ruffles or layers.