I'm sorry to hear you're experiencing vomiting, nausea, and neck pain in the back. These symptoms together could indicate several conditions, some of which may require prompt medical evaluation.

• Vomiting and nausea can be caused by infections, gastrointestinal issues, or other systemic problems.
• Neck pain at the back, especially if severe or accompanied by vomiting and nausea, could suggest issues such as meningitis, muscle strain, or other neurological concerns.
• Because neck pain with vomiting and nausea can sometimes signal serious conditions, it is important to seek urgent evaluation by a doctor, preferably a neurologist or an emergency physician, to rule out any serious causes.

Please do not delay in consulting a specialist doctor to get a thorough examination and appropriate tests. If symptoms worsen, such as increasing neck stiffness, fever, severe headache, confusion, or difficulty breathing, seek emergency care immediately.To narrow down potential causes, we will need some more information.Please tell me your age and gender.