What could be a triggering factor for dermatitis?

Dermatitis can be triggered by various factors, making the selection of all listed options as the correct choice. Weather changes can affect the skin’s barrier function, leading to dryness or irritation. Changes in temperature or humidity may aggravate existing skin conditions or cause new instances of dermatitis, as the skin responds to environmental conditions.

Infections can also be a triggering factor for dermatitis. Certain bacteria or fungi on the skin can trigger inflammatory responses, leading to dermatitis. This scenario is particularly prevalent in cases of eczema or other pre-existing conditions where the skin is more susceptible to infections.

Allergic reactions are a common trigger for dermatitis as well. When the skin comes into contact with allergens — such as certain fabrics, fragrances, cosmetics, or even foods — it can initiate an inflammatory response, resulting in dermatitis.

Since all these factors can independently provoke dermatitis, the option encompassing all of them is indeed the most comprehensive and accurate choice.