The first thing depends on whether you are physical or optical. Optical four months is unlikely to swell, only a small chance of skin allergies, spots, pigmentation and other improper operation, high-frequency sequelae.

If it is physical, it is very likely, such as 1, improper anti-inflammation: whether to take medicine on time and hang water to reduce inflammation, whether to apply ice three days after operation, whether to apply hot compress three days later, or 2, infection from water: gauze is not changed frequently, or the wound is flooded, the environment is gloomy, bacteria grow, personal hygiene is improper, and autoimmune is weak. 3. Party A's responsibility: unlicensed hygiene.

At this time, it is best to go to a general hospital for treatment, hang water and eliminate infection as soon as possible.