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Asthma is a condition in which your airways narrow and swell and may produce extra mucus. This can make breathing difficult and trigger coughing, a whistling sound (wheezing) when you breathe out and shortness of breath. For some people, asthma is a minor nuisance.

Vitiligo is a condition in which the skin loses its pigment cells (melanocytes). This can result in discolored patches in different areas of the body, including the skin, hair and mucous membranes. Vitiligo (vit-ih-LIE-go) is a disease that causes loss of skin color in patches.

Kidney stones form in your kidneys. As stones move into your ureters — the thin tubes that allow urine to pass from your kidneys to your bladder — signs and symptoms can result. Signs and symptoms of kidney stones can include severe pain, nausea, vomiting, fever, chills and blood in your urine.

Infertility means not being able to become pregnant after a year of trying. If a woman can get pregnant but keeps having miscarriages or stillbirths, that's also called infertility. Infertility is fairly common. After one year of having unprotected sex, about 15 percent of couples are unable to get pregnant.