Guimlop, that huge red circle and swelling (often called a 'wheal' reaction) is a major red flag that goes beyond just 'bad quality.'
When you experience localized inflammation like that with HGH, it’s usually caused by one of two things:
Bacterial Endotoxins: If the manufacturing process isn't truly 100% sterile (which is common in basement labs), there are microscopic remains of the E. coli bacteria used to synthesize the recombinant DNA. Your immune system recognizes these protein fragments and attacks the injection site, causing that 'STD-like' flare-up you mentioned.
High Benzyl Alcohol Content: Some cheap sources over-saturate their bacteriostatic water or the lyophilized powder with preservatives to compensate for poor lab conditions. This causes a localized chemical burn in the subcutaneous tissue.
If the HGH 'doesn't work' (no increased IGF-1, no hand numbness, no improved sleep), you are likely injecting a 192-amino acid sequence instead of the proper 191-amino acid human sequence. The 192 sequence is cheaper to produce but the body often creates antibodies against it, which not only causes those red welts but can actually neutralize your own natural GH production over time.
Stop using that batch immediately. A red, hot, and expanding circle can quickly turn into a sterile abscess or a systemic infection. Stick to high-purity, vacuum-sealed somatropin that has been batch-tested for purity and dimer levels. Quality is non-negotiable when it involves your immune system.