Hi, Thanks for your query. After a sudden fall on the foot, appearance of pain, swelling, tenderness, etc are all indicative of hematoma formation either due to a soft tissue injury or due to a hairline fracture. For diagnosis it is important to get an x-ray foot and a MRI scan of the area done. X-rays are very sensitive for picking up any fracture and MRI is one of the best tests for ruling out and identifying soft tissue injuries in the area of fall. I recommend you to consult an Orthopedician for proper examination and required investigations. You can wait till tomorrow morning if the pain is not very severe and the swelling is not actively increasing. Meanwhile - 1. Do a cold compress on the area of injury. 2. Avoid weight bearing on the foot. 3. Keep the foot elevated on two pillows while resting. 4. Get some mild pain killers prescribed from your doctor I do hope that you have found something helpful and I will be glad to answer any further query. Take care A