take care of yourself; receive medical treatmentIn farewells, it commonly means “take care” or “look after yourself.” In medical contexts, it means to receive treatment or recuperate.
TH: ช่วงนี้อากาศเปลี่ยนบ่อย รักษาตัวด้วยนะ
EN: The weather has been changing a lot lately, so take care.