Scientists have discovered a weird and wacky quirk regarding how poison frogs have sex. Several species of male poison frogs use a "swollen fingertip" to pass pheromones into the female during sex, ...

Swollen hands can be a troubling symptom, often indicating an underlying health issue. While occasional mild swelling can be normal, persistent or severe swelling could signal a more serious problem.

Swollen lymph nodes are often a sign that your body is fighting an infection. Autoimmune diseases can also cause lymph nodes ...