I went on a business trip in Lagos, Nigeria for 2 weeks with colleagues. After coming back to Paris, France, 3 of us are having canker sores. Mine appeared about 2 days after coming back, I don't know for the other
As there seem to be no clear consensus on what exactly causes them, I am looking on explanations on what factors could have helped their apparition, and how we could possibly mitigate them, as we are going to travel somewhat regularly to Nigeria.
Here are a few points I think could be leads on the reasons of canker sores:
- Weather is far colder (5-10°C v about 30°C) and drier in Paris than in Lagos.
- Lagos feels a lot more polluted than Paris -even though it can only be an impression linked with the colder weather - and walking near a big street felt like it was hard to inspire among all the exhaust gas.
- We ate more spicy food then in Lagos than now in Paris, however it would seem as a reason on having canker sores there, rather than having them when coming back.
EDIT : to clarify, I am not asking for a treatment, even preventive (though I'd be interested to hear about it), but rather on what possible causes (environmental, food) could have caused canker sores, and possibly ways to mitigate them. As there are questions clearly asking if they need to use a specific medical treatment or not, I don't feel like my question is off-topic, at least not on the basis on asking for health advice.