People with anxiety can experience any of the following. Although some of the most common symptoms are listed, this is not in any way a comprehensive list. People can experience any number of physical symptoms.

• Headache
  

• Stomachache
  

• Dizziness
  

• Diarrhea
  

• Muscle tightness or tension
  

• Sleep disturbances (trouble falling asleep or trouble staying asleep)
  

• Tiredness or lethargy
  

• Shortness of breath or rapid breathing
  

• Rapid heart-beat or palpitations
  

• Shaking or trembling
  

• Chest pains
  

• Sweating
  

Physical symptoms can be extremely severe during a anxiety or panic attack. Sometimes, people will believe they are dying or having a heart attack.

The physical and emotional symptoms of an anxiety attack are frightening for many people.

References:

“Anxiety, Panic Attacks and Disorders”, 2008, June 6, Melinda Smith, M.A.,  Helpguide.org

“Anxiety Disorders”, 2007, National Institute of Mental Health