I have had these issues, they recur from time to time when i overdo it on squats or sprints.
What has worked for me:
Calf stretches, especially AIS and Down Dog.
Foam rolling or, even better, rolling calves over a lacrosse ball.
Compression socks (i used to wear these babies on the court-but finally succumbed to peer pressure and now only use them after playing).
What has not worked for me:
Explicit rest (symptoms just return when i go back on court-even after multi-month layoff)
Any stretches or excercises that have you hanging your heels below the forefoot.