Lightheaded or feeling dizzy and Unusually tired

On this page you can find conditions that could be the cause of these symptoms although it is not a complete list of possible conditions.

Please note that if you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.

Information written and reviewed by Certified Doctors.

Conditions

High altitude pulmonary oedema

Altitude sickness is a common condition that can happen when you climb to a high altitude too quickly.


Symptoms of this condition may include:

  • Shortness of breath
  • Headache
  • Feeling sick or nausea
  • Unusually tired
  • Lightheaded or feeling dizzy

Our Health A-Z contains more information on High altitude pulmonary oedema.

If you are worried about this condition you can try our free AI Symptom Checker here.

SVT

Supraventricular tachycardia (SVT) is the name given to an abnormality of heart rhythm, characterised by a fast heartbeat.


Symptoms of this condition may include:

  • Feeling heart beat
  • Loss of consciousness
  • Chest pain
  • Lightheaded or feeling dizzy
  • Shortness of breath

Our Health A-Z contains more information on SVT.

If you are worried about this condition you can try our free AI Symptom Checker here.