Hi, Tightness in the chest, between the shoulders, along with congestion, and other symptoms like dizziness and lightheadedness can have various possible causes. It s important to consult with a healthcare professional for an accurate diagnosis and appropriate treatment. A few potential causes could be: * Respiratory infections: Respiratory infections, such as the common cold, flu, or bronchitis, can cause symptoms like chest tightness, congestion, and rattling in the chest. These infections are typically accompanied by other symptoms like coughing, sneezing, and sore throat. * Asthma: Asthma is characterized as the narrowing and inflammation of the airways. It can cause chest tightness, shortness of breath, coughing, wheezing, and congestion. Triggers for asthma symptoms can include allergens, exercise, or exposure to certain irritants. * Allergies: Allergies to environmental triggers, such as pollen, dust mites, or pet dander, can lead to chest tightness, congestion, and other respiratory symptoms. Allergic rhinitis (hay fever) can also cause dizziness and lightheadedness in some cases. * Acid reflux: Gastroesophageal reflux disease (GERD) can cause symptoms such as chest tightness, heartburn, and regurgitation of stomach acid into the throat, which may lead to congestion and a feeling of heaviness in the chest. * Anxiety or panic attacks: Psychological factors like anxiety or panic attacks can sometimes manifest as physical symptoms, including chest tightness, shortness of breath, and dizziness. If you require a personalized response, kindly use the Ask A Doctor service and post a follow-up. Take care. Hope I have answered your question. Regards, Dr. Priyanka, General & Family Physician