The term cellulitis is commonly used to indicate a nonnecrotizing inflammation of the skin and subcutaneous tissues, a process usually related to acute infection that does not involve the fascia or muscles. Cellulitis is characterized by localized pain, swelling, tenderness, erythema, and warmth.
In addition to confirming the previously identified asthma gene located on chromosome 17, researchers found another gene located on chromosome 1q31 was associated with an increased risk of childhood asthma in both children of European and African ancestry.
Asthma Triggers. Acute asthma exacerbation is often caused by a particular trigger. Common triggers include allergens, exercise and poor air quality. Respiratory viruses, especially rhinovirus, cause the majority of asthma exacerbations in both children and adults. Changes in weather such as extreme heat or cold may also cause spasm of the airways.