What type of asthma is categorized as not caused by environmental exposure but rather by internal feelings and stress?

Intrinsic asthma is characterized by asthma that is not triggered by external allergens, such as environmental exposures, but rather by internal factors such as stress and emotional distress. This type of asthma often arises without a recognizable allergic response, making it distinct from other forms of asthma. Patients with intrinsic asthma might find that their symptoms are exacerbated by stressors, strong emotions, or internal conditions rather than exposure to allergens like pollen, dust mites, or animal dander.

In contrast, allergic asthma, also known as extrinsic asthma, is primarily triggered by environmental allergens, making it fundamentally different from intrinsic asthma. Extrinsic asthma involves an immune response to specific allergens. Childhood asthma specifically refers to the onset of asthma symptoms during childhood and may include either intrinsic or extrinsic factors, but it does not specifically indicate the lack of environmental triggers. Therefore, the unique characteristic of intrinsic asthma being linked to internal feelings and stress is what makes it the correct choice in this context.