Rukjen
I'm sure you meant to write that your l0 Year (not month)-old daughter has precocious puberty. If she is, indeed, l0 y.o. this age is not particularly early. I work with children, and have known 6 y.o. boys and 9 y.o. girls to go into puberty. Generally, they can't handle it emotionally because they don't understand what is happening to them. Their hormones are becoming active and often the children are frightened and sometimes angry. Perhaps this stress is tiring? I'm sorry I don't have a definitive answer to your question, but perhaps this observation will help