Early symptoms of small cell lymphoma include localized symptoms, such as abdominal lumps and pain, and systemic symptoms, such as weight loss and fever, as the disease worsens. After complications occur, it may cause symptoms related to complications such as enlarged kidneys and swelling of the body. 1. Localized symptoms: Small cell lymphoma grows in the abdominal cavity, which usually causes abdominal lumps or hard lumps, and is also accompanied by abdominal pain. If small cell lymphoma grows in the lungs or mediastinum, it will easily cause chest tightness, chest pain, cough, shortness of breath and coughing up phlegm, etc. If it grows in the throat, it will cause nasal congestion, difficulty in swallowing and bleeding from the nasal cavity. 2. Systemic symptoms: small cell lymphoma will spread all over the body with the aggravation of its condition, which will make the body in a weak state, showing symptoms such as weight loss, fatigue of limbs, sweating, fever and so on. 3. Symptoms of complications: small cell lymphoma may be accompanied by kidney proliferation, which may easily cause weakening of kidney metabolic function and renal edema. There may also be bone damage, which may easily show spinal cord compression or lumbar vertebrae compression, causing bone pain and symptoms such as unfavorable flexion and extension. Patients with small cell lymphoma need to go to the hospital in time and cooperate with doctors to receive regular treatment.