Nutrition basics
Learning Center
COVID-19: Long-term effects
Learn about the possible long-term effects of COVID-19.
Wrinkles
These lines in the skin are a natural part of aging that's also affected by sun exposure and smoking. Learn about prevention tips and treatment options.
How to take your temperature
Learn how to get an accurate temperature reading at home, using common types of thermometers.
How to take your pulse
Learn two ways to take an accurate pulse, or heart rate.
Peyronie disease
Understand what causes bent and painful erections and learn what treatments are available.
Epididymitis
This inflammation of the coiled tube at the back of the testicle that stores and carries sperm is usually caused by a bacterial infection.
Hydrocele
Find out more about the symptoms, causes and treatments for this swelling in the scrotum.
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