Need to consult. Does she have oral breathing due to nasal block??? Need to rule out adenoid hyper trophy.

Greetings nightly coughing fit that triggers vomiting is common in children due to a sensitive gag reflex.One major possibility is cough-variant asthma, which often triggers persistent coughing spells exclusively during sleep.Post-nasal drip from lingering allergies, colds, or sinus infections can also irritate the airway while lying down.Other potential underlying conditions include gastroesophageal acid reflux (GERD) or infections like whooping cough.Keep your child well-hydrated with fluids and avoid over-the-counter cough suppressants unless approved by a physician

It could be due to many reasons...Duration of this symptom?Any associated breathing difficulty?It could be due to postnasal drip,  gastric reflex, or allergy..

Reasons can be many. She requires detailed evaluation and medication. Consult a good experienced pediatrician.

totally understand your concern. Before suggesting treatment, I would like to ask a few questions to ensure the correct management can be provided. Contact me on Practo or WhatsApp chat. Contact number: 97012307 two nine Dr. G. Avinash MBBS, MD (Pediatrics) Fellowship in Neonatology

vomiting after coughing is common in kids continuous cough can be Viral infection , taking time to. settle down , a reactive airway or sometimes reflux /ENT related.

Get some tests done for kid X ray Cbc esr

Drink warm water

A cough that occurs predominantly at night and is severe enough to cause vomiting (post-tussive vomiting) should be evaluated by a pediatrician. Common causes include asthma/cough-variant asthma, allergic rhinitis with post-nasal drip, enlarged adenoids, sinusitis, gastroesophageal reflux, or occasionally pertussis (whooping cough). Please note: • How long the cough has been present • Any wheezing, breathing difficulty, snoring, or nasal blockage • Fever, weight loss, or contact with someone having prolonged cough • Vaccination status If the cough has been occurring for more than 2–4 weeks or is happening every night, a clinical examination is recommended to identify the cause and start appropriate treatment.

Cough during only night means that could be due to Gastric reflex, Post nasal drip, Allergy to Fan , Ac.  You need to use Anti Allergy medicine

It’s due to some infection that she can either in throat , lungs . There are also many reasons like any foreign body ingestion For that child needs to be examined physically .