My google citation score rise automatically with time on receiving citations from newly / old publications by different authors. But my citation reduced by approximately 10-15 numbers just 3-4 days back. It also happened last year but 3-4 citations were reduced that time. Why it happens so. Does not Google Scholar measure the citations appropriately. Do anyone have some reasons that why citations are firstly increased and then reduced. Also some citations are marked with '*' sign. What does that mean?