Thanks for writing your query.
Low blood sugar
and electrolyte disturbance can be the cause of dizziness
, headache and fainting
in your daughter.
Breakfast is an important meal as it is taken after a long gap from last eaten meal i.e dinner. So it should not be missed.
Water is essential for body and needs to be taken in adequate amount.
Also get her blood tested for
1. Sugar (Fasting and PP levels)
2. Serum electrolytes.
Give her plenty of fresh fruits and vegetables and encourage her to drink pure water.
I hope this is helpful to you.