Thank you for your query on Healthcare Magic.
Coming to her constipation
I advise you to give the diet with rich of dietary fiber
like vegetables, green leafy vegetables, and fruits as the dietary fiber helps to pass soft stools.
The pain is due to tear of rectal mucosa while passing hard stool.
If the motions are hard you can give an oral stool softner like lactulose
in prescribed dose.
Give plenty of oral fluids.
And she needs examination to look for any fissure formed there which may cause of the severe pain
Coming to your second one, stuffy nose, cough, and discharge from eyes looking like resulted from a viral illness.
Clean the eyes with a soft clean cloth soaked in clean, sterile water.
Consult the Pediatrician
for the examination and for the prescription of medication.
Hope I have answered your query.