Sometimes the cervix opens and thins early, putting a pregnancy at risk. Learn more about this hard-to-diagnose condition.
Disease
Indigestion
Is it indigestion or something else? Find out about causes, symptoms and treatment for this common digestive condition.
Disease
Infant jaundice
Learn about this common condition in newborns, especially those born preterm. With close monitoring and light therapy, complications are rare.
Disease
Infant reflux
Learn more about this condition in which a baby spits up food or liquid. Most babies outgrow this common condition by the age of 18 months.
Disease
Infectious diseases
Viruses, bacteria, fungi and parasites all can cause infections. Find out more about how to prevent and treat these conditions.
Disease
Infertility
Find out about the challenges of not being able to get pregnant. Learn the causes, risk factors, and treatments including insemination and in vitro fertilization.
Disease
Inflammatory bowel disease (IBD)
Long-lasting diarrhea and belly pain could be caused by inflammatory bowel disease, also called IBD. Learn about IBD causes, diagnosis and treatment.
Disease
Inflammatory breast cancer
Learn about this rare, aggressive type of breast cancer that causes a swollen breast. Treatments include surgery, radiation, chemotherapy and others.
Disease
Influenza (flu)
Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.
Disease
Ingrown hair
Learn about causes, treatment and prevention of this common, painful skin condition — sometimes called razor bumps, barber's itch, shave bumps and pseudofolliculitis barbae.
Disease
Ingrown toenails
Learn about causes, prevention and treatment of this common, painful nail condition that usually affects the big toe.
Disease
Inguinal hernia
What happens if part of the intestine bulges through a weak spot in abdominal muscle? This condition can be painful and often requires surgery to fix.