Swollen. Try resting and elevation. Low sodium diet! Compression hose lots of water stay out of the heat see your pcp regarding ankle swelling.
Maybe. The increased heat can have an affect on your swelling but what was the original cause and how long has it been going on. It sounds like you need to have it examined and treated.
Depends. If this is from an acute injury like a sprain, cold would be better. If this is more chronic or happening at the end of the day you would be better off using a compression sock. Let me know if I can be any more help.
Either way or both. Depending on the proximal cause of the swelling, the ankle can be treated with either heat, bold or both. Generally cold is for a more acute or recent injury. Heat can help with a chronic issue, mainly to increase blood flow and to promote healing.
Edema. Swelling about the ankle may have a different sources ranging from sprains and strains to increased sodium intake to lymphedema, etc.... See your physician for further eval of the edema and reccs.....
Both. Ankle swelling has many causes including vasodilation, venous insufficiency, lymphedema, high blood pressure, kidney problems, etc... Heat exhaustion will cause a temporary shut down of the kidneys, thereby also possibly causing swelling to the ankles.
Yes. When you become overheated, your body seeks to lower it's temperature by vasodilating and allowing increased blood flow to the skin. This can result in edema.