HI,Welcome to HCM.
Based on the facts of your query,In My opinion You should Get opinion of your ENT doctor about the cause of the lump-as it could be-
Otitis Media with Neck nodes with post-inj lump on the abdomen or it could be due to lipoma.
The occassional
night sweats could be due to Low grade Otitis Media with
adenitis.Repeat FBS and PPS would indicate if any review of
Insulin doses is needed or not.For this check with your doctor.
Remedy-
Second opinion from a ENT surgeon would resolve the issue by his examination and USG and needed tests.
Antibiotics
Anti-iflammatory drugs
IF no relief , your Ent doctor would plan further treatment by surgery or change of antibiotics as need be.
Hope this reply would help you to resolve your health concern and its worry.
Welcome for any further query in this regard
Will appreciate writing your feedback review comments,to help the needy patients like you at HCM.
Good Day!!
Dr.Savaskar,
Senior Surgical Specialist
M.S.Genl-CVTS