Being a runner himself, my doctor knew it would have been devastation for him to tell me I need to take time off.
But it was a "good" injury he told me, more of an annoyance than a problem. He suggested heat, massage and a slight decrease in mileage.
It is occurring because of all the trails and snow running I have been doing. Side to side, NOT front to back. Not my Achilles but just tendons from steadying myself and stabilizing on the snow, rough patches and uneven ground. All good!
Did 14 hilly kilometres today but stayed on the roads to keep it even as possible. It started hurting around 12 km and I did a mix of running and walking.
Beautiful day but windy.