Myalgia

Myalgia: Pain originating from muscle. It can be caused by various factors such as injury, overuse, infection, or certain medical conditions. Symptoms of myalgia include muscle soreness, stiffness, and weakness. Note, this term is not generally used in reference to the normal soreness experienced after strenuous exercise.

From the Greek prefix and suffix:

• Myo - word-forming element meaning "muscle," from combining form of Greek mys for "muscle," literally translating to "mouse" (as in "little mouse under the skin") - etymology online
• algia - word-forming element denoting "pain," from Greek algos "pain," . Related to alegein (of unknown origin) "to care about," originally "to feel pain." - etymology online