<unk>  or Emesis means forcible emptying of the contents of stomach in which the stomach has to overcome the pressures that are normally in place to keep food and secretions within the stomach.Nausea and<unk>  are most common causes for patients to seek primary care treatment, so it is<unk> ery important to identify  and properly manage the underlying problems causing<unk> .Though the mechanisms causing of nausea and<unk>  are not completely understood, it is thought that the activation of a medullary<unk>  centre by either afferent input from the gastrointestinal tract due to presence of local irritants or  stimulation of the central chemoreceptor trigger zone by circulating emetogenic substances may cause<unk> .Dopamine and serotonin are the main transmitters both in central nervous system and  gastrointestinal tract related<unk> . The most common causes of<unk>  are Gastroenteritis, Migraine, Gastro peresis,Post operative, radiation and chemotherapy related<unk> , tumor, increased intracranial pressure,Hepatitis, Cholecystitis,Labyrithitis, Alcohol abuse, pregnancy induced<unk> . The management of  most cases of nausea and<unk>  depends on a good history and a detailed complete physical examination. Most episodes of<unk>  that lasts for less than 48 hours have an existing triggering factor such as infection,<unk> iral illness, or food poisoning and can be managed by removing the triggering factor and by supportive therapy. Chronic and unexplained nausea and<unk>  can be a difficult to treat as the cause is often obscure and requires special investigation.
Vomiting
Headache
Headache  
Constipation
Constipation  
Cough  
Cough
Sore throat