Symptoms of a finger infection can vary, depending on the location and severity. For example, symptoms of a nail infection can be discoloration and cracked or hardened nails. An infection in the finger from a cut in the skin can cause a discharge of pus and pain. Swelling and red streaks on the surface of the skin can be other common symptoms of a finger infection. It is not uncommon to experience a low to moderate fever when a finger becomes infected.
When a nail becomes infected, the surrounding skin usually becomes inflamed. Redness and swelling usually occur with infected nails. An infected nail can cause drainage, although some mild cases will show nail discoloration and slight discomfort. Drainage under the nail may include yellowish-green pus. Pain and soreness usually occur when the area is touched.
Mild to moderate finger infections can also cause itching. Itching usually occurs in the early stages of the infection, followed by more noticeable symptoms. An infection in the finger due to an injury or cut may start with reddening of the skin from an injury that does not seem to heal. A stabbing or burning pain may be felt in the area, and pus may come out as pressure is applied.
In severe cases of a finger infection, the range of motion may be affected. The inability to move your finger freely can be a symptom of infection. The stiff joint of an infected finger may also be swollen and red. Body temperature can rise and rise if the infection is not treated in a timely manner.
Common causes of a finger infection are bacteria that can enter the body through an open cut or second- or third-degree burn on a finger. Viral infections of the fingertip are medically known as herpetic whitlow. Cellulitis can also cause infection of the finger, although the underlying tissue is usually not affected.
Treatment of a finger infection may include a procedure known as incision and drainage. This is done by a doctor who drains the infected fluid from the area. A topical antibacterial ointment can be applied to the finger or around the nail. In some cases, the patient will be instructed to dip the finger in warm water several times a day. The patient may also receive a course of oral antibiotics to treat the finger infection.