<s>[INST] 7-year-old vomits, usually at night 1-4 hours after falling asleep. Feels better after vomiting once or twice. No fever. Grinds teeth in her sleep. Vomits up to three times a week, but sometimes goes three-four weeks without vomiting. Fine in summer, June-October. Happens all winter long, every year. Doctors find nothing. gagged easily as infant. breastfed first three years. milk intolerance but not allergic. [/INST] Hi.... I understand your concern. By what you say I feel that she might be having a gastroesophageal reflux which is a comorbid condition, along with some allergic bronchitis. I am associating this with allergic bronchitis, as you say this is happening only in the winter months. Sleep bruise is quite common when there is worm infestation. I suggest you consult your pediatrician and ask for anti-reflex therapy with this tip. I feel she will improve with anti-reflex therapy. Regards -  </s>