A red, swollen bag with white spots from a bug bite may be a secondary bacterial infection from bug bite dermatitis. You can wait for the abscess to absorb on its own, or you can relieve it by local incision and application of medication.
After being bitten by insects, the body will show signs of insect bite dermatitis, but if you find red swollen bags with white spots on top, it is possible that insect bite dermatitis is followed by bacterial infection and abscess formation. If the abscess is small and the symptoms are mild, you can wait for the abscess to absorb on its own, but if the abscess is large and forms an abscess cavity, the possibility of self-absorption is small, then you can pick open the abscess in the hospital or cut open and drain the pus.
If the symptoms of infection are serious, or even chills, fever and other systemic symptoms, you can take ceftazidime and other drugs under the guidance of the doctor for anti-infection treatment.
After being bitten by mosquitoes, if the local symptoms continue to be unrelieved or other uncomfortable symptoms appear, it is recommended to go to the hospital in time. All of the above drugs should be used in accordance with medical advice.