One day while you are drying off from your shower, you notice that there is swollen, red area on your ankle. It is slightly tender when you touch it, but otherwise isn’t too bad. You go about your day and notice there is a nagging aching in your ankle, but you don’t think much about it. By the time you get your sock off when you get home, you notice the swollen area has doubled in size and it has become even more painful. What is going on? Is it serious? Do you need to get treatment right away?