Because wool is a natural fibre, there is occasionally some variance in texture and there might be bits of your yarn that are thinner or thicker than others - this is totally normal!We recommend you continue knitting with the yarn (it adds to the character!) however you can always cut that part out of the yarn and then start with a new piece if it’s not your jam,You might also find a knot in your yarn - this is also a totally normal part of the spinning process that happens from time to time. Again you can keep knitting and give the knot a wiggle so it ends up on the wrong side of your garment..