Find an Ophthalmologist. Dark spots can refer to blind spots or to shadows moving across vision cast by specks floating in the eye. The symptoms and possible related eye conditions/diseases in this section are for general reference only, and do not contain all visual symptoms or all possible related conditions or diseases.
A boil is a red, swollen, painful bump under the skin. It often looks like an overgrown pimple. Boils are often caused by infected hair follicles. Bacteria from the infection form an abscess, or pocket of pus. A boil can become large and cause severe pain. Boils most often happen where there is hair and rubbing.
Summary. 1  A boil is just one type of abscess which forms on skin, abscesses can occur anywhere in the body including livers, lungs, brain, etc and can be quite deadly as well. A boil occurs often as a result of an infected hair follicle while an abscess occurs as a result of insertion of foreign objects such as splinters, bullet wounds, or injecting needles.