A hem is a finished edge on a piece of fabric that is folded over and sewn down to prevent fraying. It is commonly found at the bottom of garments like pants, skirts, and dresses, as well as on sleeves and other openings. Hems can be sewn by hand or by using a sewing machine, and they come in different styles such as blind hems, rolled hems, and topstitched hems. **

Rolling the sweater hem refers to the natural tendency of the bottom edge of a knit sweater to curl up or roll inwards. This can happen due to the tension of the knit fabric and the way it naturally wants to lay. Rolling the hem can also refer to intentionally folding or rolling the hem of a sweater to create a different look or style. This can be done to adjust the length of the sweater or to create a more casual, relaxed appearance. **

To sew a hem, start by folding the edge of the fabric over to the desired hem width and press it with an iron to create a crease. Then, fold the raw edge under and press it again. Next, stitch along the folded edge using a straight stitch or a blind hem stitch. Finally, trim any excess fabric and press the hem one final time to ensure it lays flat. **

Embroidery thread is a type of thread specifically designed for use in embroidery and other decorative stitching. It is typically made from cotton, silk, or synthetic materials and comes in a wide variety of colors and thicknesses. Embroidery thread is often stronger and more lustrous than regular sewing thread, making it ideal for creating intricate and detailed designs on fabric. It is commonly used in hand embroidery, machine embroidery, and other needlework projects. **

To detach a hem from jeans, start by carefully cutting the stitching that holds the hem in place using a seam ripper or small scissors. Be sure to only cut the stitching and not the fabric of the jeans. Once all the stitching is removed, gently pull the hem away from the jeans to separate it completely. Finally, you may need to iron out any creases or marks left behind from the previous hem. **

The twisting of the hem of T-shirts is often caused by the way the fabric is cut and sewn together. The tension applied during the sewing process can lead to the fabric twisting slightly. Additionally, the type of fabric used in T-shirts, such as jersey knit, can also contribute to the twisting effect. Washing and drying T-shirts can further exacerbate the twisting due to the movement and heat involved in the process. **

No, the hem of the top does not roll up. It is designed to stay in place and maintain its shape, providing a clean and polished look. The fabric and construction of the top are intended to prevent rolling or bunching at the hem, ensuring a smooth and flattering fit. **

If you have a crooked hem on a piece of clothing, you can try to straighten it out by carefully re-measuring and marking the hemline. Then, use a ruler or measuring tape to ensure that the hem is even all the way around. Pin the fabric in place and then carefully sew along the new hemline. If the crooked hem is on a knit fabric, you may need to use a stretch stitch to prevent the fabric from puckering. If you're not confident in your sewing skills, you can also take the garment to a tailor for professional help. **