Selena Gomez has hit back at internet trolls who have body-shamed her, resulting in her speaking about her struggles with small intestinal bacterial overgrowth.On October 29, the Only Murders in the Building star attended the debut of her new movie Emilia Perez at the DGA Theater Complex in Los Angeles.

Many people living with SIBO experience difficulty with getting a diagnosis. That's because the symptoms of SIBO closely resemble signs of other GI conditions like IBS or indigestion, according to the Cleveland Clinic. However, experts believe that IBS tends to be more pain-predominant, while SIBO is more bloating-predominant, per Yale Medicine.

SIBO stands for small intestinal bacterial overgrowth. It happens when there’s an unusual increase in the overall population of bacteria in your small intestine, particularly types of bacteria that aren’t normally found in that area of your GI tract, per the Mayo Clinic.