I'm glad that your son is doing better and yes I believe the sea helps a lot.
My husband always had allergies after he turned 30, but when we lived in El Salvador he never had them there, but as soon as we came back to Canada and every Spring & Summer he would get them really bad.

Let me know if you need any help or if you have any questions about the oils. I'm pretty sure doTERRA does sell them and ship them to Spain, if you decide to try them out.

Have a lovely Friday my dear friend.