Why do children grow taller when they have a fever?
Generally speaking, a child's growth in height usually has no direct relationship with fever, and growth in height typically does not directly cause fever. These two factors are generally unrelated. If there is any discomfort, timely medical consultation is recommended. Detailed analysis is as follows:

A child's height development is primarily influenced by family genetics. If the parents have ideal height, the offspring's height usually will not be significantly affected. Secondly, height development is also related to postnatal habits. Those who regularly exercise, have good sleep quality, follow a regular diet, and maintain adequate nutrition tend to have more ideal height development. However, these factors have no direct connection with fever, so fever generally does not lead to height growth.
Fever mainly includes infectious and non-infectious factors. The former may be related to infections caused by bacteria, viruses, mycoplasma, chlamydia, and other factors. These pathogens may repeatedly stimulate the body, causing elevated body temperature and resulting in fever. The latter may be associated with conditions such as rheumatic fever, systemic lupus erythematosus, or allergic purpura. These causes are generally unaffected by height development, and there is typically little correlation between them.
If fever persists, timely medical examinations are necessary to guide targeted treatment based on diagnostic results, so as to avoid delaying the condition. Additionally, sufficient rest and adequate sleep should be ensured during treatment.