Muscle Strain: The latissimus dorsi muscle is one of the largest muscles in the back, and strain or overuse can lead to soreness and a burning sensation, especially if the individual has recently engaged in unfamiliar or strenuous physical activity.

Poor Posture: Prolonged periods of poor posture can lead to strain on the muscles of the upper back, including the latissimus dorsi, resulting in soreness and discomfort.
Thoracic Outlet Syndrome: This condition involves compression of the nerves and/or blood vessels that pass into the thoracic outlet (the space between your collarbone and first rib), which can cause pain and burning sensations in the upper back and arm.
Costochondritis: Inflammation of the cartilage that connects the ribs to the breastbone can cause sharp pains and a burning sensation in the chest and upper back area.

Pulmonary Embolism: Although less likely, a pulmonary embolism (a blood clot in the lungs) can cause sudden, severe chest pain that may radiate to the upper back, and it is crucial to rule out this potentially life-threatening condition.
Myocardial Infarction: Chest pain or discomfort that radiates to the back can be a symptom of a heart attack, especially if accompanied by other symptoms like shortness of breath, nausea, or arm pain.
Spinal Cord Injury or Herniated Disk: Trauma or injury to the spine can cause severe back pain and burning sensations, and it is essential to consider these diagnoses to prevent further damage.

Latissimus Dorsi Syndrome: A rare condition characterized by pain and swelling in the latissimus dorsi muscle, often due to direct trauma or overuse.
Tietze's Syndrome: A rare inflammatory condition that affects the cartilage of the ribs, causing chest pain and tenderness that can radiate to the upper back.
Sickle Cell Crisis: In individuals with sickle cell disease, a crisis can cause severe pain episodes, including back pain, due to the sickling of red blood cells.