I feel tightness behind my knee, calf and pain on my foot , specially ankle . no injury, no redness , no bruises. i've been feeling pain in different parts of my leg it's been a week?

Try to remember what you were doing unusual the weeks or days before this happened. Suspect you will turn up the cause. Did you fall or almost fall and catch your self, new exercises?, moving furniture?, lifting something?, long hike?, Old injury aggravated by new movements? Your body is talking to you. Listen and take good notes and share with your Dr or us.