There are some medical issues you come to expect after 40: knee pain, high cholesterol, trouble sleeping — you get the picture. Then, there are others that come as a surprise, like how difficult it ...

Medically reviewed by Danielle McNeil, D.P.M Key Takeaways Subungual onychomycosis is the most common type of toenail fungus and affects the nail bed and underside of the nail. White superficial ...