Thank you for your question.
I am Dr. Su S. and I will try my best to help you.
I am sorry for her symptoms.
Excess urination can be due to infection.
Stress or intake of plenty of liquid can be a factor.
Yellow crusting can be due to infection or inflammation of the eyelids.
Both inflammation or infection can cause irritation of the eyes.
Thus involuntary movements can be more.
Antibiotic can be needed.
You should take her to an ophthalmologist asap.
After examination, if the doctor suspects about any neurological issue, then he can refer to pediatric neurologist.
Then doctor can decide on CT/ MRI and further tests to know the precise cause.
I hope this information will be helpful.
If you have any query, please feel free to ask.
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Wish her healthy life.