Dizziness or lightheadedness, especially when standing up
Fainting or feeling like you might faint
Blurred vision
Nausea
Fatigue or unusual weakness
Confusion or trouble concentrating
Cold, clammy, pale skin
Rapid, shallow breathing
Thirst
Feeling unusually tired after standing or exertion
A blood pressure reading below 90/60 mmHg
Symptoms that improve when lying down
Seek urgent medical help if low blood pressure comes with chest pain, severe shortness of breath, severe confusion, or loss of consciousness