Inflammation. Usually caused by repetitious movement of your arm.
Knots in the back of the arm can be caused by a number of conditions such as inflammation or infection. To get rid of these, swing the arms back and forth, as well as do some shoulder circles.
Swelling or edema of the arm is an indication of inflammation or disturbances of blood or lymph flow causing a swollen appearance of the hand, forearm or fingers.
It can, the inflammation causes increase pressure on nerves, causing numbness in arm/fingertips
Your arm may be sore and difficult to straighten due to muscle strain, overuse, injury, or inflammation. It is important to rest the arm, apply ice, and consider seeking medical advice if the pain persists.
Doms, or delayed onset muscle soreness, occurs when muscles are overworked or strained. When a muscle is sore, it may be difficult to fully straighten the arm due to inflammation and muscle tightness. This can limit the range of motion and make it uncomfortable to fully extend the arm.
Pain between the bicep and tricep in the outer arm can be caused by overuse, muscle strain, or inflammation of the tendons in that area. It can also be due to conditions like tendonitis or bursitis.
After a workout, you may have difficulty straightening your arm due to muscle fatigue and inflammation. This can cause temporary stiffness and limited range of motion in the affected muscles. Rest and gentle stretching can help alleviate this issue.
Inflammation can be caused by many sources; sports, injuries, stress, repeated motions, arthritis, poor nutrition and so on. The only way to know is consult with a doctor and discuss possible lifestyle related damage.
It could be loose or inflammation of lymph nodes. You might want to see a doctor.
After a workout, you may have difficulty bending your arm due to muscle fatigue and inflammation. This is a normal response to exercise as your muscles need time to recover and repair. Stretching, rest, and proper hydration can help alleviate this temporary stiffness.
No, by now it would've reached your chest. Go have it checked though. it could be a muscle inflammation and that you will be needing pills for.