arnica 6x ground up and mixed with talc and used with gentle lymphatic drainage will help the condition.
synchronicity here....
I fell over a metre last week and did the same thing. My daughter brought out what she thought was Arn. 1M. but was in fact Anac 1M which I discovered when I was in triage at the local hospital. I panicked somewhat until I got home and found Anac to be a specific antidote for ill effects of ivy ( which I had been clearing- check to see if there was any in the woodland) and also useful for lower limb joints (ankles?)
No ill effects from the Anac for me..maybe has curbed my usual hyperactivity and allowed me to sit an heal......so maybe a consideration for an acute remedy for ankle injuries in ivy covered areas!