Why does my fingernail hurt when I apply pressure to it?

There are a few reasons why your fingernail might hurt with pressure. Sometimes, a small injury—even one you might not remember—can cause bruising under the nail (a subungual hematoma), which makes it sore when pressed. Infections, like paronychia (an infection of the skin around the nail), can also cause pain and swelling, especially if the area is red and tender. Additionally, conditions like osteoarthritis can sometimes involve the nails and make the nail bed hurt when pressure is applied. Other signs to watch for include changes in color, swelling, or if the pain is accompanied by joint issues. It is important to note that each situation is unique, and observing these additional symptoms can help guide what might be causing your pain. If the discomfort continues or worsens, you can check your symptoms to better understand what might be happening and determine whether you need to see a doctor for a proper diagnosis and treatment plan.