Hi Dear !! Thanks for your query to HCM . Read and reviewed your query and health concerns. You seem to suffer from --Chronic PUO with Low weight with OSA(Obstructive Sleep Apnea) mostly- Cause of this PUO leading to night sweats could be from Adenoids with Sinusitis.Weight loss is mostly the result of hypercatabolism with Chronic unnoticed PUO causing night sweats.The night wetting in the bed is mostly due to the low grade pyrexia with night sweats. The apnea during night is mostly from the accompanied Adenoids with hidden accompanied sinusitis. Other Causes of this low weight needs to be ruled out -by X-ray Chest and IGRA test of sputum and of the Blood. Stool tests for ova/ cyst to rule out the worm infestation with PUO with low weight and bed wetting needs to be ruled out.Blood tests for anaemia and Sinus X-ray study to rule out hidden frontal sinusitis is needed. Consults with paediatric doctor / with chest-Allergy specialist/ and Ent specialist would fix the causes of the undiagnosed apnea with low weight and bed wetting with night sweats. Hope this reply would help you to resolve the health issues with help of doctors attending on you. If need be, update any health issue 24 x 7 by a direct question to ME, at following HCM link- Dear, if satisfied,Don t forget to close this query with YOUR pleasing feedback comments to rate this reply and service, to boost the morale of incoming Emergency patients like YOU, at HCM services. If you want to update more details and ask more update queries , You are most Welcome herewith !! Good Day!! Wishing Good Healthy Life in time to come!! Dr.Savaskar M.N. Senior Surgical Specialist M.S.Genl-CVTS