This seems be an allergic reaction. Allergies are common in the summer months. Allergy is caused by an oversensitive immune system
, which leads to a misdirected immune response.
Common allergens include pollen, mold, pet dander, and dust. Food and drug allergies are common. Allergic reactions can also be caused by insect bites, jewelry, cosmetics, and other substances.
Some people have allergy-like reactions to hot or cold temperatures, sunlight, or other physical stimuli.