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.
Hormonal changes are a common cause of nipple symptoms. Hormonal changes can occur at the onset of puberty; during menstrual cycles, pregnancy, breastfeeding, perimenopause and menopause; and with the use of hormone medications. Nipple symptoms can be caused by physical changes, such as weight fluctuations, or other causes, such as nipple injury or breast surgery. Nipple symptoms can also be caused by breast cancer and other diseases, disorders or conditions, such as breast infections and hypothyroidism (underactive thyroid).