Looks like its a normal side effect of hgh;
If you notice these less serious side effects, talk with your doctor:
Increased sweating.
Muscle pain or stiffness.
Numbness or tingling in your hands or fingers.
Pain, redness, burning, swelling, a hard lump, or skin changes where your shot is given.
Stomach pain, passing gas, or bowel problems.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); body pain or stiffness; burning, tingling, itching, or numbness in the palm of the hand, fingers, or wrist; change in appearance or size of a mole; chest pain; depression; constant feeling of need to empty the bowel; curvature of the spine; ear infection; excessive thirst or hunger; fast heartbeat; fever; frequent urination; increased pressure in the head or eye; infection; injection-site lump, bruise, or redness that does not go away; injection-site rash, heat, or pus; nausea; pain or stiffness in joints; persistent or severe pain or ache at the injection site; severe or persistent swelling of the ankles, legs, hands, or feet; severe, persistent, or unusual headache; stomach pain; visual changes; vomiting.
Taken from lists of sides from 2 pharma grade HGH products.
Steve