Hello, * As per my clinical experience, the nausea, severe abdomen cramps with light headache and low appetite indicate intestine infection with some sort of bacteria most likely. My guidelines for her better recovery - allow her more liquids containing boiled water, lemon juice, coconut water home made fresh juices - consume easily digestible food stuffs - avoid all spices, non veg, junk food, dairy fat - anti emetic as ondancetron, PPI as Omeprazole, anti pyretic as paracetamol or acetaminophen, antibiotic as cefixime or ofloxacin - if needed , she may require blood report of complete hemogram with or without serum widal test. Hope I have answered your query. Let me know if I can assist you further Take care Regards, Dr. Bhagyesh V. Patel, General Surgeon