Potential side effects of injected human growth hormone include edema, or swelling due to fluid building up in tissue; carpel tunnel syndrome; skin numbness or tingling; and elevated cholesterol levels, according to WebMD. It can also cause nerve, joint and muscle pain.
Other relatively common side effects include ear congestion, dry skin and hair, and diarrhea, states Mayo Clinic. Mental health side effects, such as anxiety, a depressed mood and irritability, can occur as well. Those who experience these symptoms generally do not need medical attention if the symptoms resolve and are not particularly bothersome. However, there are some potential side effects that indicate the patient should seek medical care promptly. Some of these symptoms are blurred vision, a severe headache, heart rate changes and chest pain.
Human growth hormone treatments are meant for patients who do not experience normal growth or who suffer from other conditions. People with normal growth who take injections risk a number of potentially serious side effects from human growth hormone levels that are too high, explains Mayo Clinic. Patients might experience abnormal growth of bones and internal organs, such as the heart, liver and kidneys. These patients are at a higher risk for diabetes, and they might experience atherosclerosis, or hardening of the arteries, and hypertension, or high blood pressure.