In fact, ICDs are composed of an ICD generator and of wires. The first component or generator, contains a computer chip or circuitry with RAM (memory), programmable software, a capacitor and a battery; this is implanted typically under the skin in the left upper chest.
1 The medial malleolus, felt on the inside of your ankle is part of the tibia's base. 2  The posterior malleolus, felt on the back of your ankle is also part of the tibia's base.  The lateral malleolus, felt on the outside of your ankle is the low end of the fibula.
An ankle sprain can lead to swelling at night, as can common sprain-type injuries such as ankle bone fractures, tears in the outside ligaments of the ankles and injuries to the ankle tendons or nerves. You also may experience ankle instability, difficult walking, tenderness, pain and stiffness.