Hello, thanks for using Health Care Magic.
The ankle is a very delicate region with potential severe complications following ankle trauma. Ankle trauma can result to various pathological entities ranging from sprains to complicated fractures that can bring disability.
The rapid evolution of your symptoms indicate that there its a serious issue needing immediate attention. It could be a trauma to an ankle ligament or even an ankle bone that is affected.
The most feared condition will be a fracture which dis-stabilizes the the ankle joint ( such as pathological variants of the bi-malleolar fractures) as it will require surgery for correction less you will develop a disability.
What is important to do now is to see a doctor for proper examination and at least for an x-ray to rule out fractures and or dis-stabilization of the ankle joint.
Best regards and wish you a speedy recovery.
Dr. Achuo

Hi,
Welcome to the forum.
It might be soft tissue injury or fracture.
Without X-ray, it is difficult to differentiate a fracture from others. I suggest you to consult an orthopaedician nearby for a detailed examination. You may get the X-ray of the area affected under his/her guidance.
In the interim,apply ice packs to the affected area,anti-inflammatory drug like motrin to reduce pain and inflammation. Avoid putting weight and rest well.
I hope this information has been both informative and helpful for you.
You can consult me again directly through my profile http://www.healthcaremagic.com/doctors/dr-saurabh-gupta/64132
Regards.
Dr Saurabh Gupta.

Hello,
Welcome to healthcare magic.
There are some possibility of severe ankle pain.
There may be soft tissue injury or bone injury.
Give hot compression to the affected area.
Give rest of the affected joint.
You may take NSAID for pain relief.
If these measures fail to improve the condition then you may go for a x-ray of the affected joint.
Take care.