5. Pecans Spark Progressively Severe Allergies
Now the not-so-good stuff about eating pecans. Nuts are a particularly common allergy trigger, and pecans tend to spark symptoms that become progressively worse the more you eat them. So it is entirely possible to have low-level skin itching from one exposure that you might not even attribute to the nuts, and then later have a much more serious reaction upon eating more.
The symptoms of a pecan allergy that you need to look out for include hives, swelling, itching, shortness of breath, wheezing, dizziness, coughing, nausea, vomiting, and diarrhea. If you have developed a progressively serious allergy to pecans over time, you could come to the point where just touching them or breathing in pecan dust causes a dangerous reaction.