Relieve Muscles Aches & Pain - Use Your Home Toolbox Pain Spasm Pain Cycle At the root of a lot of muscle pain is a condition called “pain spasm pain cycle.” Pain causes muscle to tighten, spasm, or hyper-contract. Most athletes know that contracting muscles produce lactic acid of which a buildup results in pain. Hyper-contracted muscles also restrict the blood flow to the area, a [...]