¿Hay algún problema con la parte posterior de mis pies?

Your left foot is causing proble­ms. There's swelling, pain, and re­dness. Fluid build up too. An infection could be the­ issue. Or an injury perhaps. Maybe e­ven gout. The inflammation symptoms are worrying. You ne­ed help quickly. Antibiotics might help if infe­cted. Pain medication would ease­ discomfort. Draining fluid may be neede­d too. 

Your symptoms are similar to osteoarthritis. This condition occurs when the protective cartilage in the joints wears down over time, causing pain and stiffness. Your doctor may recommend physical therapy, lifestyle changes, or surgery to manage symptoms. Continue monitoring your symptoms and contact your doctor if you experience any new or worsening symptoms.

It sounds like you have a muscle tear in your calf muscle. This can happen if you overdo it on your muscles or damage them. You may experience symptoms like pain, swelling, and difficulty in leg movement. It is necessary to let your leg rest, apply ice and elevate it to speed up healing. Gentle stretching and physical therapy can also be effective healing methods. Stick to your doctor's recommendations and you are sure to make a complete recovery.