Dizziness and Nausea: Common Causes, Warning Signs, and What to Do

Dizziness and nausea are a common symptom combination that can happen for many different reasons. Sometimes the cause is relatively mild, such as dehydration, motion sickness, or low blood sugar. In other cases, dizziness and nausea may be related to migraine, inner ear problems, infection, or another condition that deserves medical attention.

If you are experiencing dizziness and nausea right now, try our symptom checker for a personalized assessment.

Common Causes of Dizziness and Nausea

Dehydration

Dehydration is one of the most common causes of dizziness and nausea. Low fluid levels can reduce circulation, leading to lightheadedness, weakness, headache, and stomach upset.

Vertigo and Inner Ear Problems

Vertigo often causes a spinning sensation, imbalance, and nausea. Inner ear issues such as benign positional vertigo, vestibular neuritis, or other balance disorders are common causes.

Migraine

Migraine can cause nausea, dizziness, sensitivity to light, and head pain. Some people experience vestibular migraine, where dizziness is a major feature.

Low Blood Sugar

If you have not eaten enough, low blood sugar can cause shakiness, sweating, dizziness, weakness, and nausea.

Viral Illness

Many infections cause nausea, fatigue, dizziness, and dehydration, especially if you have fever or poor oral intake.

Anxiety or Panic

Anxiety can cause hyperventilation, dizziness, nausea, tingling, and feeling faint. Panic attacks can make these symptoms feel intense and alarming.

More Serious Possibilities

Most cases are not emergencies, but some need urgent care.

Neurological Emergency

If dizziness and nausea happen with weakness, numbness, trouble speaking, or severe headache, urgent evaluation is critical.

Heart Rhythm or Circulation Problems

Faintness, palpitations, chest pain, or symptoms with exertion can point to a heart or circulation issue.

Severe Dehydration

If you cannot keep fluids down or feel close to fainting, urgent treatment may be necessary.

Red Flags

Get medical help urgently if you have:

• fainting or near-fainting
• chest pain
• weakness or numbness
• trouble speaking
• new severe headache
• confusion
• severe dehydration
• persistent vomiting

What You Can Do at Home

If there are no red flags, it may help to:

• sit or lie down until symptoms settle
• drink water or electrolytes
• eat a balanced snack if you may not have eaten enough
• avoid sudden head movements
• avoid driving if dizziness is significant
• rest in a quiet place

When to See a Doctor

See a doctor if:

• symptoms keep coming back
• dizziness interferes with normal activity
• nausea prevents normal eating or drinking
• you suspect vertigo, migraine, or low blood sugar issues
• symptoms are worsening or unusual for you

Bottom Line

Dizziness and nausea together are often caused by dehydration, vertigo, migraine, anxiety, low blood sugar, or illness. But symptoms that are severe, persistent, or linked to fainting or neurological changes need prompt attention.

Use our symptom checker to better understand what might be causing your symptoms and what next step makes sense.

This article is for educational purposes only and does not replace professional medical advice.