If you suffer from carpal tunnel syndrome or other related illnesses that affect your hand's median nerve, you know exactly what it is like to feel pain and itch in your thumb and index fingers. The muscles and tendons that allow your hands to move are susceptible and so are easily damaged by even the slightest injury. This is why your fingers become swollen so quickly. It is also why they ache so badly in the morning or in the evening. Sometimes you may even be able to distinguish when you have been injured to the point that it hurts to type or grip hard. But unless you get the proper medical attention, your hand can quickly swell to the point where you cannot perform simple everyday tasks or even grip a toy properly. One of the main reasons why your hand swells is because you have developed a bacterial or fungal infection in your hand. Bacteria and fungi thrive in moist environments, like those that result from constantly wetting your hand or constantly washing your hands. And these pathogens love to grow in areas that are constantly damp, warm, and dark - exactly the sort of conditions to which your hands end up being exposed. In other words, if you are continually wetting your hand and constantly washing it, you are setting yourself up for infections. Fungi and bacteria can cause severe problems for people with weak immune systems - and infections can cause severe damage to soft tissues and the nerves that control your fingers. (Nerve signals, which carry information from one nerve cell to another, pass through the entire body and are affected if the nerve becomes infected.) You might get a mild case if you only have a pimple or small wound, but if the infection spreads to the tendons and surrounding areas, you could quickly develop serious nerve damage and severe inflammation.
The third reason why your hand may be swollen is related to a direct injury. One common injury is a fall, which can also cause a wide variety of problems. You might break a finger, or cut a finger open, or even scrape your hand raw from a fingernail. When they involve only a small area of your hand, these injuries usually heal without any issues. If, however, the injury involves a larger size, you may have trouble healing properly. Your hand will swell because the tissue it is covering is too damaged for it to protect itself. If, for example, you accidentally cut off a finger with a nail clipper, you may find that the finger gets infected. This type of cut, called a "punchout," is the most common type of amount that causes infection. An infection will generally start in the first few days after the injury, and it may continue to spread. If left untreated, the infection will probably spread to other areas of your hand as well, causing a chain reaction. In other words, it's not enough to start with a "punchout" finger; if the infection spreads across your hand, you may get a severe problem. You may end up with gangrene, necrosis (swelling of the tissues), or amputation of a finger. In some cases, you may have a swollen finger. It could be a simple case of overdoing it, and you should try to relax after the workout. Over-extending your finger may cause swelling due to increased blood flow, causing the finger to be swollen for no real reason. You may want to get a second opinion if you feel that your finger is getting swollen. Your doctor can perform a proper diagnosis of what is wrong, and he can recommend the best course of action.