Thickened toenail, possibly runner injury over time, nail doesnt grow just gets thick, as if the nailbed isnt allowing it to grow upward. could this be a fungus? it is only one toenail - next to pinky toe?

It is not uncommon to develop a nail as you describe it. A nail traumatized from a constant activity can develop. Sometimes a cushion insole can be help. Some runners grip the shoe while running. An orthotic to lift the digit taking pressure off the nail. There are many options. Depending on your perceived outcome. Over the counter anti fungal can be used see a podiatrist for diagnosis and treat

Often thickened toenails from injury are mistaken for a fungus infection. However, a fungus infection is most often the cause. of thickened toenails. Since the treatments are different for injury vs fungus, I'd consult a.podiatrist for accurate diagnosis and proper treatment.