A drilled well consists of a hole bored into the ground, with the upper part being lined with casing. The casing prevents the collapse of the borehole walls and (with a drive shoe or grout seal) prevents surface or subsurface contaminants from entering the water supply.The casing also provides a housing for a pumping mechanism and for the pipe that moves water from the pump to the surface. drilled well consists of a hole bored into the ground, with the upper part being lined with casing. The casing prevents the collapse of the borehole walls and (with a drive shoe or grout seal) prevents surface or subsurface contaminants from entering the water supply.
Hives and angioedema can be caused by: 1  Foods. Many foods can trigger reactions in people with sensitivities. 2  Medications. Almost any medication may cause hives or angioedema. 3  Common allergens. Other substances that can cause hives and angioedema include pollen, animal dander, latex and insect stings.  Environmental factors.
Yet the most common causes include: 1  Stress Hives Hives are itchy bumps caused by your immune system. 2  They're generally caused by allergies, but they can also be triggered by stress. 3  Anxiety causes a considerable amount of stress, so those prone to hives are likely to get them.