Muscle malady is a term used to describe any type of pain or discomfort that affects the muscles. Common muscle maladies include ACHE, SPASM, STRAIN, KNOT, and CRAMP. ACHE is a dull, continuous pain that can last for days or weeks. SPASM is an involuntary contraction of a muscle, often caused by stress or fatigue. STRAIN is an injury to a muscle or tendon caused by overstretching or overuse. KNOT is a tight, painful area in a muscle caused by tension or stress. CRAMP is a sudden, involuntary contraction of a muscle, usually caused by dehydration or overexertion.