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Consent to treatment
Consent to treatment is the principle that a person must give their permission before they receive any type of medical treatment. Consent to treatment means a person must give permission before they receive any type of medical treatment, test or examination. This must be done on the basis of an explanation by a clinician. Consent from a patient is needed regardless of the procedure, whether it's a physical examination, organ donation or something else.
Confusion (sudden)
Delirium is a sudden change in how well a person's brain is working (mental status). Delirium can cause confusion, change the sleep-wake cycles, and cause unusual behavior. Delirium can have many causes, such as withdrawal from alcohol or drugs or medicines, or the development or worsening of an infection or other health problem.
Common cold

The common cold is a viral infection of your nose and throat (upper respiratory tract). It's usually harmless, although it might not feel that way. Many types of viruses can cause a common cold.

Children younger than 6 are at greatest risk of colds, but healthy adults can also expect to have two or three colds annually.