Causes of a large pustule on the face include acne, boils/carbuncles, mosquito bites, and systemic diseases.
1. Acne: initially manifested as inflammatory papules, which gradually form pustular acne as the disease progresses.
2. Boils/carbuncles: Usually caused by Staphylococcus aureus infection, which can be seen as a suppurative inflammatory reaction of the hair follicles and deeper tissues on the face, resulting in the formation of large pustules.
3. Mosquito bites: pustules may also appear after mosquito bites and secondary infections on the face.
4. Systemic diseases: some systemic diseases (such as chickenpox) can also cause pus on the face.
A large pustule on the face, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor to improve the relevant examination to clarify the diagnosis, and need to standardize the treatment, so as not to delay the condition.