67 aged man with a suprapubic recurrent right groin hernia. A hernioplasty was carried out in which a polypropylene plug was placed in the recurrence point. No drain was left in place, and the patient was discharged the same day. After 3 days the patient came with a fluctuating mass located in the right groin below the surgical wound with no signs of infection, and he was discharged after seroma aspiration.
Cultures of the aspirated fluid tested negative for bacterial growth. Right now 50 ml seroma aspirated per day. What should be treatment process?