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Parotid duct obstruction is when part of your parotid duct becomes blocked. The parotid duct is a small tube that leads from a gland that makes saliva. The duct sends the saliva into your mouth. When it's blocked, saliva can't flow normally.

Borderline personality disorder (BPD) is a serious medical illness. It can make close relationships hard to maintain, and it may cause the affected person and their loved ones great pain. But BPD can be treated, and the symptoms can be eased. If a loved one has signs of BPD, start by talking to your doctor or a mental health professional. They can offer guidance and support.

Breasts change over time. Their size and texture may vary with shifts in your body weight. Breasts also change as you go through different stages of your life.

Puberty is the stage of adolescence when your child begins to develop physically into an adult. During puberty, a girl's breasts begin to grow. As the breasts develop, problems like lumps or infections sometimes happen. These problems can be alarming. But they are common and rarely serious.

Learn how the parts of your ear work together to help you hear and how damaged hair cells affect your hearing.

BPD is a long-term lung disease that causes breathing problems in newborns and babies.

Here are common signs of an alcohol addiction.

You may notice signs that your period is coming for a week or two before it starts. Most of these signs go away soon after each period begins. You may have some, all, or none of the signs.

Laryngoscopy and bronchoscopy are 2 procedures that may be done together. These allow the doctor to see inside the air passages in the throat and lungs. A laryngoscopy looks at the throat and vocal cords. Bronchoscopy looks at the trachea (windpipe) and lungs. These procedures can be used to diagnose and treat certain problems