Anaesthesia is a treatment that protects the patient from feeling pain during a complex procedure or surgery. The medication used for this process is known as anaesthetics and different kinds of anaesthesia can be classified based on the impact they have on a patient’s body. Some anaesthetics induce painlessness in only a particular part of the body while there are others numb the brain to induce sleep during surgeries. Anaesthesia temporarily blocks the pain signals transmitted from nerves to the brain. Doing so sends the patient into a state of numbness for the duration of the treatment.