This section can contain a lot of unproven speculation and anecdotal information without scientific proof. Anyhow, it may offer some leads into some unusual and poorly understood conditions.
There are several conditions which might be caused or worsened by H.pylori. Acne rosacea is a red skin rash on the face, it may respond to HP therapy. Patients with HP have increased permeability of the gastric mucosa and so are potentially exposed to unprocessed antigens from food. This might predispose to immune problems. H.pylori antibodies cross react with several tissues in the GUT so autoimmune states are possible with H.pylori. Weird skin rashes have occasionally disappeared when H.pylori was treated.
Many patients experience improved well being and energy level when H.pylori is treated so consider it in Gulf Veterans Syndrome and Chronic Fatigue Syndrome.
Lots of people with chronic halitosis respond to treatment for H.pylori. This may be because mouth bacteria, sinus and periodontal disease responds to the same antibiotics. It may be that H.pylori is the cause of the halitosis (bad digestion, achlorhydria etc.). In any case, treating H.pylori might be worthwhile.