What causes thigh pains?
Thigh Pain can be caused by many factors such as Infected lipoma, septic arthritis and chronic osteomyelitis. The same also goes for Ewing's tumor, rhadomyosarcoma and osteosarcoma. Injuries can lead to excruciating pain. These can mainly include groin strain, rupture of the rectus femoris and pulled hamstring. Other causes are inflammation of the adductor muscles, contusion of quadriceps and tight hamstring muscles.
If a bee sting on the right thigh causes a quick involuntary reaction of the right arm what kind of reflex occured?
Why would overstraining a damaged thigh muscle cause strong stomach cramps like period or menstrual pains?
What causes sharp severe knife like pain in your right thigh that has progressed to sharp knife like pain all day if your clothing brushes against your right thigh?
There could be many causes. Some are obvious, like a knife to the thigh, but that probably isn't it, since you are asking. Bone disease, cancer, or just cramps or circulation problems could be culprits. It could also be psychological or exercise or stress related. The best idea is to go see a doctor and get it checked out.