I am very depressed and i cut myself my arm swelledwound is this serious?

Serious: Yes, on a number of levels. An emergency evaluation is necessary to asses the wound and your mental state. Self- injurious behaviors may mean suicidality, or at least emotional instability. If you have a psychiatrist, contact that person. The wound is described as swelling - good chance it's infected and could lead to serious conditions-cellulitis and sepsis (blood infection), a medical emergency.

Seek help: First, please address the wound first with your md or walk in clinic. If the wound is red and swollen, you may have an infection. Secondly, depression is also a medical illness and needs to be treated with the appropriate medication and therapy. The cutting implies that you need help coping in a more productive manner. Cutting is never the answer. Get an appointment with a psychiatrist.