I have a slight shakiness in both of my hands. I have observed a few things. My fingers shake a little. Here are my observations: 1.They shake when I place my arm in the table and lift my palm up. 2.Fingers shake when I place my palm flat in the table and lift my fingers. 3.Fingers shake when brought close to each other loosely. 4.Increases a bit when my hands feel hot and decreases when feeling cold. 5.My finger and hand sometimes feel weak and sometimes I can't make a fist due to lack of strength. So what is going on with me? Is it something serious?