Lateral Epicondylitis (Tennis Elbow): This condition is characterized by pain on the outer part of the elbow, which can radiate down the posterior forearm. It's common in individuals who repetitively use their wrists and forearms, making it a likely diagnosis given the symptoms.

Medial Epicondylitis (Golfer's Elbow): Although it typically causes pain on the inner aspect of the elbow, it can also radiate down the forearm and might be considered, especially if the pain is more medial than lateral.
Radial Tunnel Syndrome: This condition involves compression of the radial nerve and can cause pain in the back of the hand and the forearm, which might be consistent with the described symptoms.
Cervical Radiculopathy: Nerve root irritation in the cervical spine can cause pain that radiates down the arm, potentially affecting the forearm and causing elbow pain, depending on the nerve root involved.

Acute Compartment Syndrome: A medical emergency that requires prompt diagnosis and treatment. It can cause severe pain, especially with arm movement, and can lead to permanent damage if not addressed quickly.
Infectious or Septic Arthritis of the Elbow: Although less common, an infection in the elbow joint can cause severe pain, swelling, and systemic symptoms, and requires immediate medical attention.

Osteochondritis Dissecans of the Elbow: A rare condition where a piece of cartilage and bone in the elbow joint becomes damaged, leading to pain and potentially locking of the joint.
Tumors (e.g., Osteoid Osteoma, Ewing's Sarcoma): Although extremely rare, tumors can cause localized pain and should be considered in the differential diagnosis, especially if the pain is persistent and unexplained by more common conditions.