Serotonin syndrome is a serious drug reaction. It is caused by medications that build up high levels of serotonin in the body. Serotonin is a chemical that the body produces naturally. It's needed for the nerve cells and brain to function. But too much serotonin causes signs and symptoms that can range from mild (shivering and diarrhea) to severe (muscle rigidity, fever and seizures). Severe ...
Overview Irritable bowel syndrome (IBS) is a common condition that affects the stomach and intestines, also called the gastrointestinal tract. Symptoms include cramping, belly pain, bloating, gas, and diarrhea or constipation, or both. IBS is an ongoing condition that needs long-term management.
Overview Ehlers-Danlos syndrome is a group of inherited disorders that affect your connective tissues — primarily your skin, joints and blood vessel walls. Connective tissue is a complex mixture of proteins and other substances that provide strength and elasticity to the underlying structures in your body.
Myelodysplastic syndrome subtypes include: Myelodysplastic syndromes with single-lineage dysplasia. One blood cell type — white blood cells, red blood cells or platelets — is low in number and appears abnormal under the microscope. Myelodysplastic syndromes with multilineage dysplasia. In this subtype, two or three blood cell types are ...
Autism spectrum disorder includes conditions that were once thought to be separate — autism, Asperger's syndrome, childhood disintegrative disorder and a form of widespread developmental disorder that isn't specified. Autism spectrum disorder begins in early childhood. Over time, it can cause difficulty functioning in society. For example, people with autism spectrum disorder may have ...
Down syndrome is a genetic condition caused when an unusual cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome. The term "syndrome" refers to a set of symptoms that tend to happen together. With a syndrome, there is a pattern of differences or problems. The condition is ...