Swelling is part of the body's natural response to inflammation caused by traumatic inflammation, or it can indicate that your body is having difficulty circulating fluid. The swelling that is concentrated on your calves or calves may simply be due to standing in place for a long time, or it may indicate a more serious condition, such as a blood clot in the leg. If your leg starts to effusion, you must seek emergency medical treatment, but you have not explained why your calf is swollen.

Less traumatic
Some reasons for calf effusion do not indicate a medical emergency. When you experience the liquid accumulation, the situation is that you have stood up or sat for a while. The condition develops because gravity attracts the fluid in the leg and pulls it from the rest of the body to the lower leg. If you are overweight, you are more prone to this type of swelling because your body may have difficulty circulating blood and other fluids. In addition, if you have experienced an injury, such as a leg injury or bruise, your body's inflammatory response may cause your calves to swell. If your swelling does not improve with positioning or time, this may indicate a more serious injury.
Peripheral edema
Surrounding edema is a medical condition in which the body responsible for fluid filtration does not respond to the effects of filtration when your part occurs. These areas include your kidneys, circulatory system or lymphatic system. The result may be swelling of your calves or legs, which may indicate medical conditions such as kidney failure, blockage of the lymphatic system or swelling of the heart. Although these are not necessarily emergency situations, they do indicate that further inspection is needed.
Drugs
Taking certain medications may cause the calf fluid to accumulate. Antidepressants, antihypertensives, estrogens and steroids can cause swelling in the body, including swelling of the legs. Check with your doctor or pharmacist to determine if the medication you are taking may cause swelling in your legs. You can take some precautions. According to MedlinePlus, such as a low-sodium diet, raise your legs while sitting or lying down or wearing support loop stockings.