( CNN ) -- Miley Cyrus could be in celebrity sick bay for another three weeks because of an `` extreme allergic reaction '' to an antibiotic , her representative said Thursday . Her illness interrupted her `` Bangerz '' tour when she was admitted to a Kansas City hospital Tuesday . Cyrus , 21 , tweeted to fans Thursday morning that she is `` over the hospital , '' along with a photo of her lying in bed . She added : `` ca n't quit crying i wan na go back on tour . im meant to be onstage performing for y'all ... not laying in a hospital bed . '' She canceled a show in Charlotte , North Carolina , last week because of what was reported to be a flu-like illness . Tuesday 's Kansas City and Wednesday 's St. Louis shows were also canceled . The statement sent to CNN by Cyrus ' representative did not specifically say it , but it implied that her upcoming shows over the next week -- including Nashville ; Louisville , Kentucky ; Philadelphia ; Uniondale , New York ; and Connecticut -- would be off . `` Miley was suffering from a sinus infection during her tour in N.C. a week ago . She was prescribed the antibiotic Cephalexin which she has now suffered an extreme allergic reaction to , '' the statement said . `` This type of extreme reaction can last from five to 27 days in these types of cases . `` She will remain hospitalized and is under a doctor 's care until we see some improvement in her condition and is asking for your compassion and privacy at this time . Miley is devastated about missing shows and possibly disappointing her fans . '' Miley : Post-Disney , post-Liam and stronger than ever . Miley 's miserable day . Is Miley the new Madonna ? CNN 's Carolyn Sung contributed to this report .
Cyrus ' ` ` Bangerz '' tour was interrupted when she was admitted to a hospital Tuesday . She tweets : ` ` ca n't quit crying i ' na go back on tour '' Cyrus suffered an ` ` extreme allergic reaction '' to an antibiotic for her sinus ##itis . Doctor says her illness will last from five to ten days .