Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to remove muscle knots [title] Identify muscle knot areas. [step] Some muscle knots hurt without pressure, so they're easy to identify. Others don't hurt until you apply pressure.

Ending1: You have something that you can't touch but you're having trouble identifying it, focusing on those knots. [substeps] Muscle knots that are painful are usually caused by knots where the right pressure applies. Ending2: Using your fingers, gently probe your muscles looking for pressure points. You may feel a knot or bump in the muscle. Ending3: The most common muscle knots are : [substeps] Tightness or squeezing squeezing the muscle until it separates from the muscle. Tightness can cause muscle spasms to occur. Ending4: Take a look at a single muscle knot and identify it by looking at the size and shape. Common muscle knots include : [substeps] Pleural knots.

Answer format: ending1/ending2/ending3/ending4