You need to buy a shotgun that fits you. The only sure way to find a shotgun that properly fits you is to make an appointment with a firearms expert. Pull the gun to your shoulder. Always point the muzzle in a safe direction. See if the gun swings into place without extra effort. Pay attention to the weight of the gun - is it comfortable? Next...
There have been a lot of studies about food allergy that involves patients having asthma. You can easily see the symptoms after a couple of hours after eating a certain kind of food. Asthma and eczema are associated with atopic patients with allergies in food.