The symptoms vary enormously between people with myasthenia gravis: 1  The muscles around the eyes are most commonly affected first, as these are constantly used and can quickly tire. 2  Muscles around the face and throat are also often affected. 3  Weakness in the arms, hands, fingers, legs and neck may develop.
In its most general form, a nipple is a structure from which a fluid emanates. More specifically, it is the projection on the breasts or udder of a mammal by which, in females, breast milk is delivered to a mother's young.
Nipple pain can also be caused by certain skin conditions, such as eczema or dermatitis. These conditions can result in itchy, flaky skin that may be painful if left untreated. Fibromyalgia, a disorder that causes muscles and tissues to become tender or sore, can also result in nipple pain. In some cases, soreness of the nipples may be caused by a rare type of breast cancer known as Paget's disease.