1 Two-part, three-part and four-part fractures can occur. 2  The fractures are then classified by their degree of displacement and angulation. 3  Surgical neck fractures are the most common type of proximal humeral fracture.
About 1.8 million people in the United States experience allergies to tree nuts, the Food Allergy and Anaphylaxis Network reports. Like other tree nuts, walnuts can cause a range of unpleasant reactions.
Headaches in combination with nasal symptoms are a typical seasonal allergy complaint. However, many people do not realize that isolated headaches (without associated sneezing and runny nose) can also be brought on by high airborne allergen levels.