The following text is translated from Bahasa to English while preserving any HTML tags: "The information was conveyed by SM Entertainment through WeVerse last Tuesday. Haechan was reported to be on hiatus from all NCT 127 group activities until his tonsillitis or inflamed tonsils is treated and his condition returns to normal."

Based on the journal of the Doctor Education Program, Faculty of Medicine, Lampung University (UNILA), tonsillitis or inflammation of the tonsils is an inflammation of the tonsils, specifically in the waldayer ring area. Reported by Liputan6, this condition is caused by viral or bacterial infections that result in common cold, including rhinovirus, adenovirus, and coronavirus.

The most common type of bacteria that causes tonsillitis is Streptococcus B-Hemolytic group A. Usually, tonsillitis is diagnosed by conducting anamnesis of local and systemic complaints, as well as physical examination. Symptoms that are local complaints of tonsillitis include pain when swallowing, sore throat, bad breath, fever, snoring, breathing difficulties, stuffy nose, and recurrent cough and colds.

While the systemic complaints include weakness, decreased appetite, headache, and joint pain. Tonsillitis patients will be examined for the condition of their tonsils if there is enlargement, widening, or the presence of debris in the crypts, among others.