I was diagnosed with mesenteric adenitis a month ago,was prescribed antibiotics and was told that it go away. pain has come back..should i be worried?

Requires 2nd opinion: Some forms of mesenteric adenitis are viral in nature and will not respond to antibiotics. If you are experiencing severe , nonremitting , right lower or mid abdominal pain, go directly to the ER or call 911. Mesenteric adenitis can masquerade as appendicitis and the opposite is also true- get tested and scanned as well as blood analysis.

Wastebasket label: Everyone has tonsil like collections of lymph tissue located in the walls of the digestive tract in scattered patches from top to bottom. In some cases a swollen patch triggers appendicitis by strangling it's blood supply. When you have general belly pain but their evaluation finds no evidence of appendicitis, it is commonly assumed to be MA. If the pain came back it could be MA or appendicitis.

Maybe...: Just like lymph nodes ("glands") in your neck can wax and wane with colds or sore throats, so can the glands in your abdomen. It is extremely common for this to happen for MONTHS after the main or original time. You may need to look into whether something more chronic is going on in your abdomen if it lasts more than 4-6 months or if other concerning symptoms lime weight loss, blood in stool, etc