[…] of stomach through the mouth. cyclic vomiting recurring attacks of vomiting. dry vomiting attempts at vomiting, with the ejection of nothing but gas. pernicious vomiting vomiting in pregnancy so severe as to threaten life. vomiting of pregnancy that [medical-dictionary.thefreedictionary.com]

Irrespective of the content, vomit tends to be malodorous.The content of the vomitus (vomit) may be of medical interest. Fresh blood in the vomit is termed hematemesis ("blood vomiting"). [en.wikipedia.org]

[…] nausea, 0.69 [0.57-0.84] for next-day postoperative nausea, 0.78 [0.63-0.98] for early postoperative vomiting, 0.57 [0.45-0.72] for late postoperative vomiting, and 0.61 [0.43-0.86] for next-day postoperative vomiting. [ncbi.nlm.nih.gov]

Ira Todd Cohen, Ondansetron for postoperative nausea and vomiting, Therapy, 3, 5, (571), (2006). [doi.org]

An 89-year-old female patient presented to the ED with mild abdominal pain and a history of vomiting for 3 days. Because of dementia, further history was unclear. Vital signs were normal. [ncbi.nlm.nih.gov]

[…] to thrive in infants mood changes or feeling annoyed or impatient slowed growth and short height weight loss Celiac disease in children may lead to weight loss. [niddk.nih.gov]

A 22-year-old woman presented to the emergency department (ED) with a 24-hour history of nausea, vomiting, diarrhea, generalized abdominal pain, and mild headache. [ncbi.nlm.nih.gov]

Dehydration can cause: dry mouth fatigue dark urine decreased urination headache confusion This complication is especially serious in infants and young children who vomit. [healthline.com]

confusion, and difficulty remembering recent events CT of the head Brain hemorrhage Sudden, often severe headache Confusion CT of the head Spinal tap if CT results are normal Brain infection (such as meningitis ) Gradual headache and confusion Often [merckmanuals.com]

The patient presented with vomiting and pain abdomen, persistent hyponatremia, and terminal hypoglycemia. He had features of malnutrition and had a rapid downhill course following admission. [ncbi.nlm.nih.gov]