Diagnosis on my Achilles. What should i do?

i went to the doctor because i had been having pain in my achillies. They told me i have a problem in my achilles called os trigonum posterior impingement. My doctor wasnt clear about how long it would be until it goes away, if it ever will. I was wondering how long it would take for it to heal and if theres anything i can do in the meantime to help it heal quicker.