Peroneal tendonitis or lateral malleolus stress fracture, how to know the difference?

Location of pain. Tendonitis will also affect the peroneal muscle so the whole side of your leg will hurt. A stress fracture should only hurt in a localized area.

Related Questions

How can I distinguish between peroneal tendonitis or lateral malleolus stress fracture?

Clinically. By palpation an astute clinician appreciates the difference in anatomical location which can be subtle as the proximity of the two is obvious, diagnostic testing such as MRI would differentiate. But, kep in mind treatment can be similiar, so if you go into a cam walker boot you should heal either and don't really have to know which it is. Tendonitis is the more common of the two. Read more...

How can you tell the difference between a stress fracture and tendonitis?

X-ray. They may co-exist but by definition a stress fracture will typically be confirmed by some imaging technique, usually plain x-ray but possibly MRI or bone scan. The diagnosis can be made but not confirmed in the absence of positive imaging if the history is right and no other diagnoses fit. Read more...
Exam and imaging. Stress fractures may be hard to see on standard x-rays and additional studies such as bone scan or mriay be helpful. A careful history and exam is also very important as you correctly implied it can be confsuing so seek out so called experts such as a hand surgeon or orthopedic surgeon who specializes in that anatomical region. Read more...

What would be the differences between tendonitis and a 5th metatarsal stress fracture?

Fracture=bone. A stress fracture would be an injury to the bone - basically a crack in the bone, like a crack in a vase. Tendonitis is a condition of the tendon, in which the tendon is inflammed. Read more...

Is there a difference in pain between a metatarsal stress fracture and tendinitis in the foot?

Not really. they can feel similar. A clinical exam helps best to determine one from the other as Xray does not always show stress fracture. Best to see a foot specialist. Read more...