Calf tenderness in the left leg is pain or discomfort in the back of the left leg, between the knee and ankle.
What is the reason of this?
Calf tenderness during pregnancy may be the result of swelling due to normal fluid accumulation. It may also be related to sciatica, a condition in which the weight of a growing baby presses on the sciatic nerve, causing back and leg pain. Calf tenderness is sometimes a symptom of deep vein thrombosis, which occurs when a blood clot forms in the veins of a woman's pelvis or legs. Deep vein thrombosis during pregnancy occurs in the left leg rather than the right leg.
Tips
The best way to prevent calf tenderness is to keep your muscles flexible throughout the day. Take a small walk every day with your doctor's approval. Stretch your calf muscles several times throughout the day, and when you sit for long periods of time, move your feet in circles and flex your toes. Minimize the time you spend crossing your legs and stay hydrated; The more water you drink, the lower your risk of calf cramps or tenderness. If you experience a leg cramp, straighten your leg and flex your toes toward your leg so it looks like you're standing straight. Walking around when cramping or massaging your calf with your hand may help.
If you notice that your leg is swollen or red, warm, or cramping does not disappear, call your healthcare provider as these could be signs of a serious condition such as deep vein thrombosis.

