Muscle pain acute thighs and uooer aqrms?

Myalgia. Can be due to medication side effects, such as from statins. Or it may be due to injury, viral infection, or medical conditions, such as polymyositis/dermatomyisitis, polymyalgia rheumatica, lupus, hypothyroidism, etc. Please see a physician for evaluation.
Aches. Fatigue, overuse , virus, dehydration are common causes. Start by hydrating well, rest, try tylenol (acetaminophen).