What to Do If You Have Strep Throat While Pregnant. Sore throats are a common symptom of countless ailments. Your throat may be irritated by allergies. You may have a cold or flu. Or, you may have just been using your voice too much. The most common cause of sore throat is strep throat. A reported 15 percent of sore throat cases are caused by strep.
Boils may be caused by a weakened immune system. When a child's immune system is weak, his body is unable to resist the attack of bacteria that cause boils. Children who suffer from repeated attacks despite taking precautions to not become infected with boils need to have their blood tested.
Back to TopCauses. Boils are very common. They are most often caused by the bacteria Staphylococcus aureus. They can also be caused by other types bacteria or fungi found on the skin's surface. Damage to the hair follicle allows the infection to grow deeper into the follicle and the tissues under it.