The recommended approach is to avoid putting several pins into the identical location. Even small amounts stacked together may lead to irritation, lumps, or uneven uptake. For three or four injections, switch to different areas or keep them roughly an inch apart within the same region. Regular rotation cuts down on scar tissue and supports steadier absorption.
Is there a limit on how many times you can pin the same spot? If doing three or four injections, would spacing them out in one area be okay or does each one need its own separate site? Straightforward question for anyone who knows this stuff. Thanks.