The thyroid gland is a small butterfly-shaped gland in the neck, just in front of the windpipe (trachea). One of its main functions is to produce hormones that help regulate the body's metabolism (the process that turns food into energy). These hormones are called triiodothyronine (T3) and thyroxine (T4). Many of the body's functions slow down when the thyroid doesn't produce enough of these hormones.
Esophageal spasm is a disorder of the rhythmic waves of muscular contractions (peristalsis) of the esophagus. The cause of this disorder is not known. Symptoms include chest pain and difficulty swallowing.
Symptoms of heartburn and GERD are a burning feeling in the chest, throat, or mouth, nausea, and more. Esophageal spasms are sudden, painful contractions in the muscles of the esophagus. Food poisoning can cause abdominal pain, diarrhea, nausea, vomiting, fever, chills, and weakness. Irritable bowel syndrome is a common condition that causes painful spasms and cramping in the large intestine. Traveler's diarrhea causes watery diarrhea and cramps, sometimes with a low-grade fever.