What is the disease of inexplicable laughter

Humans have seven emotions and six desires, and joy, anger, sorrow, and happiness are all expressions of our emotions. However, these emotions only arise in specific situations in order to vent one's own stress. Most emotions can be controlled by the human body. If some people suddenly laugh for no apparent reason and cannot control it, this indicates that there is a problem with the body's nerves or facial muscles. You should seek medical treatment promptly.

Several types of pathological smiles:

A laughing fit is a sudden, unprovoked episode of laughter accompanied by a degree of impaired consciousness, a form of epileptic seizure. Some people also experience whole body muscle relaxation and collapse after the attack. Most of them are thalamic lesions.

Compulsory crying and laughing, also known as pathological crying and laughing, is a kind of spontaneous, stereotyped, and uncontrollable laughter without obvious cause and incompatible with objective reality. The facial expressions start from smiling to laughing, last a little longer, recover slowly, and lack corresponding inner experience. It is a symptom of organic brain disease. It is more common in basal ganglia and high brainstem damage.

Grin: a special silly smile. It is more common in patients with incomplete brain development and Alzheimer's disease. This kind of laughter cannot be controlled, does not require any stimulation, can occur in any situation, and has no emotional color. Therefore, although the patient is often cheerful, due to the influence of intellectual disability, his facial expression gives people a stupid feeling and is not contagious.

False smile: more common in patients with latent depression. These patients are actually depressed inside, but they often give people fake smiles, which experienced doctors can often notice.

Forced laughter: Forced laughter is a type of laughter that cannot be restrained. It is more common in patients with organic brain diseases such as senile diffuse cerebral arteriosclerosis. It can also be caused by craniocerebral trauma, brain tumors, etc.

Paroxysmal laughter: It is characterized by paroxysmal involuntary laughter, which may occur several to dozens of times a day, or once every few days to weeks. Each episode lasts for tens of seconds to minutes, which is the characteristic of laughter epilepsy. In addition to laughing, this disease is often accompanied by ADHD, EEG changes (of varying duration) and varying degrees of consciousness disorders.

Grinning: seen in patients with schizophrenia. Due to abnormal brain function, people laugh regardless of the occasion. They can laugh alone or laugh wildly. Grinning is an important feature of adolescent schizophrenia. But this kind of emotion is unstable. Sometimes the smile may suddenly stop and the expression may become serious; sometimes the smile may turn into tears, which is very capricious.

Bitter smile: common in tetanus patients. This smile does not come from the patient's heart, but is a destructive pathological manifestation. It is caused by the spasmodic toxin secreted by tetanus bacteria first invading the facial muscles, causing them to undergo tense contraction. Laughter is accompanied by symptoms such as clenched jaw, stiffness of limbs and opisthotonos.

Laughter: The hysterical laughter of a drunk or hysterical person, the laughter is manic and rapid like flying sand and rocks.

A strange smile is a smile with a crooked mouth and eyes and a weird expression shown by patients with facial nerve paralysis.

Laughing: It is more common in infants under 2 years old, and can also occur in the neonatal period. The child often smiles without any inducement, or laughs after being teased. At the same time, the whole body becomes weak and then falls to the ground. After half a minute, the child stops laughing and is able to stand up. It can occur dozens of times a day.