The thread is really tight. Sewing machine tension issues before changing the numbers on the tension dial you should take into account a couple of different issues that might be causing your tension problems.
A size 9 or 11 works best for delicate lightweight fabrics like chiffon silk and organza.
Sewing machine tension issues. Delicate threads designed for hand sewing are not suitable for use in a sewing machine. Going up or down to the appropriately numbered size can make a huge difference. Your top and bottom threads should also be of the same weight.
Sewing machine tension can be tightened or loosened to affect the needle thread the bobbin thread or both. Re thread your top thread making sure your presser foot is up while threading. Balanced machine stitches machine stitches should look the same on both sides of the seam when you sew patchwork pieces together or when you machine quilt through the quilts top batting and backing.
Adjusting the tension on a sewing machine. This can be a pesky problem because it can create an uneven stitch. If it pulls smoothly without snagging lower your presser foot do it again.
Double check that your machine is threaded properly. Its likely that when threading your machine you accidentally threaded the spool through the bobbin winding tension at the top of the machine. If youre still having issues lower the tension settings for your top thread.
A size 14 works best for medium weight fabrics like flannel linen and synthetic suedes. Machine is skipping stitches. Having proper tension on your sewing machine is crucial because it ensures your stitching will be consistent and look the same on both sides.
This is because sometimes the problem is not in the tension but in other elements in the sewing machine such as the type of needle you are using for a fabric. With your needle up your presser foot up and your tension set at 4 rethread your machine. But as important as correct tension is even well versed sewers avoid the tension dials on their sewing machines.
Needles are sized from 8 to 18 depending on their use. If these problems or any as mentioned in this post on 25 common sewing machine problems are ruled out then only check the tension. Once that is done pull your top thread using a long steady motion.
Sometimes a little lint or stray thread can cause a lot of problem in the tension area so a regular maintenance of your sewing machine is a must before you make tension changes. New home sewing machine tension troubleshooting.