A painful discolored lump on the arm called a hematoma can result from any kind of injury. But it can also be the result of a blood clot or phlebitis in one of the blood vessels of the arm or even an infection. See your doctor if you cannot move your arm.
While the list below can be considered as a guide to educate yourself about these conditions, this is not a substitute for a diagnosis from a health care provider. There are many other medical conditions that also can be associated with your symptoms and signs. Here are a number of those from MedicineNet:
A bruise, or contusion, is caused when blood vessels are damaged or broken as the result of a blow to the skin. The raised area of a bump or bruise results from blood leaking from these injured blood vessels into the tissues as well as from the body's response to the injury. Treatments include applying an ice pack and pressure to the area by hand.
Phlebitis and Thrombophlebitis
Phlebitis is the inflammation of a vein. Thrombophlebitis is when a blood clot causes the inflammation. Phlebitis can be superficial or deeper in the veins. A blood clot deep in a vein is deep vein thrombosis (DVT). Some of the common causes of phlebitis include prolonged inactivity, varicose veins, trauma to a vein, underlying cancers, clotting disorders, and other causes. Symptoms of phlebitis may be mild (pain, tenderness, redness, or bulging of a vein. Treatment of phlebitis depends on the cause.
A hematoma is a collection of blood that is outside a blood vessel. There are different areas where hematomas occur including; inside the skull, on the scalp, ears, septum, bones, finger nails, toe nails, and intra-abdominal.
Abuse, Trauma, and Mental Health
Suffering abuse and trauma can put one at higher risk of developing PTSD, anxiety, and depression. Signs and symptoms of abuse or trauma include appetite or mood changes, alcohol and/or drug abuse, difficulty sleeping, and anger. Treatment may incorporate a combination of medication and talk therapy.
At MedicineNet, we believe it is important to take charge of your health through measures such as a living healthy lifestyle, practicing preventative medicine, following a nutrition plan, and getting regular exercise. Understanding your symptoms and signs and educating yourself about health conditions are also a part of living your healthiest life. The links above will provide you with more detailed information on these medical conditions to help you inform yourself about the causes and available treatments for these conditions.