want to ask what is the lump on the calf? what danger or not?
Your complaint can be caused by various medical conditions including:
Bakers cysts: Lumps caused by accumulation of joint lubricating fluids The doctor will carefully examine the lump and ask for complaints that accompany such as pain, difficulty moving, etc. Treatment will adjust to the cause and degree of the disease. Starting from drugs to surgery.
What you can do now:
Limit your activity and get enough rest. Consumption of nutritious food. Consumption of paracetamol if it feels painful.