Por lo general, los médicos no pueden saber si una persona se ha estado masturbando (tocarse o frotarse los genitales porque le gusta lo que se siente). La única manera de que los médicos sepan si una ...

An erection is when the penis gets hard because sponge-like tissue in it fills with blood. Erections tend to make the penis get bigger and stand away from the body. Erections can go away on their own ...

These Factsheets explain the basics about health conditions that can affect learning in the classroom, and offer quick tips on teaching strategies to help students succeed in school. Each factsheet ...

What Is Coarctation of the Aorta? Coarctation of the aorta (COA) is a narrowing of the aorta, the major blood vessel that carries blood away from the heart to the body. This narrowing causes the left ...

Sports are a great way to have fun while staying fit and enjoying time with friends. But it's not always easy to keep calm when it feels like everyone around you thinks winning is everything. The key ...

Say hello to Chloe and Nurb and let them take you on a tour of the human body. You'll find out how the body's organs work and learn about body systems like the digestive system and brain and nervous ...

Teens are busy, and often skip meals. Even if you eat three meals a day, you may still feel hungry between meals. Either way, it can be tempting to grab something fast, like cookies, chips, and candy.

Flat feet are feet that do not have an arch. The middle of the foot touches the ground. Feet with no arches is the main sign of flat feet. Sometimes, flat feet can cause foot, ankle, or knee pain.

What Is a Tear-Duct Blockage? A tear duct is a small tube that drains tears from the eyes. Tears are made in glands under the eyelids. They wash over the eyes to keep them moist and clean. Then, they ...

Testicular torsion is an emergency condition. It happens when the spermatic cord, which provides blood flow to the testicle, rotates and becomes twisted. The twisting cuts off the testicle's blood ...

A cataract is any clouding or opacity of the lens of an eye. Congenital means that it happens before birth or during a baby's first year of life. A baby with congenital cataracts has clouding in one ...

What Is Neurofibromatosis Type 1? Neurofibromatosis type 1 (NF1) is a genetic condition. It causes benign (not cancerous) tumors to grow in and under the skin, often with bone, hormone, and other ...