# Which side effects can wait, and which need care? *Biologic Injections Mesa | Side Effects and Warning Signs* > Biologic injections Mesa: learn about expected soreness, warning signs and safety questions when care starts with blood or pelvic marrow. Is aching after a joint procedure expected? Mild soreness, stiffness, or swelling may last a short while, but heat, spreading redness, or rising pain needs attention. Your discharge instructions should tell you when to call. ## What may feel normal afterward? The treated joint may ache or feel full at home. A blood draw may leave a small bruise. Bone marrow aspirate concentrate, called BMAC, is made by taking marrow at your pelvis and spinning it. That leaves a second spot that may feel sore. Written instructions shouldn't leave out walking, bathing, or medicine. Expected soreness should ease rather than grow each day. ## Which signs mean you need help now? Call promptly if redness spreads or the joint feels much warmer. Fever, drainage, or feeling sick may mean infection. Sharp pain that rises quickly isn't something to watch overnight. Severe weakness or new trouble controlling your bladder or bowels needs urgent care. Fast, severe changes need medical help now. ## What does the clinic check first? At QC Kinetix, the medical providers are licensed clinic staff who review your health and sore joint. Regenerative treatments is the clinic's term for non-surgical procedures prepared after a blood or pelvic marrow draw. Tell them about blood thinners, bleeding trouble, skin sores, or infection. Don't stop a prescribed drug unless the doctor managing it agrees. The safety review comes before a treatment choice. ## What can make the visit safer? Ask who will perform the procedure and how the skin is cleaned. Get a phone number that works after closing time. You'll need clear rules for driving, bathing, walking, and medicine. If an answer isn't clear, request written instructions before you decide. Good aftercare starts with clear directions at the clinic. ## Sources 1. A meta-analysis of 6 RCTs (860 patients, 334 receiving BMAC) found overall complication rates of 41.91% for BMAC versus 41.25% for comparator injectables (P=0.85), with knee effusion the commonest BMAC complication at 18.26%. Early and late complication rates did not differ significantly from HA, steroids, PRP, SVF, MSC or saline. The number needed to harm for BMAC relative to other injections was 152. Fucaloro S, et al. — [Complication rates of bone marrow aspirate concentrate injections versus other injectable therapies for knee osteoarthritis: A systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/39473874/). *Journal of Orthopaedics*, 2025. DOI: 10.1016/j.jor.2024.10.005. 2. A double-blind randomized trial allocated 192 patients with KL 1-3 knee OA to three weekly injections of leukocyte-RICH or leukocyte-POOR PRP (mean leukocyte concentration 7,991 x10^6/L vs 0.1 x10^6/L). No difference was found in any clinical score at 2, 6 or 12 months (IKDC improved 45.6 to 60.7 vs 46.8 to 62.9; P=.626). Mild adverse events were numerically more frequent with leukocyte-rich PRP (12.2% vs 4.7%) but not significantly so. Di Martino A, et al. — [Leukocyte-Rich versus Leukocyte-Poor Platelet-Rich Plasma for the Treatment of Knee Osteoarthritis: A Double-Blind Randomized Trial.](https://pubmed.ncbi.nlm.nih.gov/35103547/). *American Journal of Sports Medicine*, 2022. DOI: 10.1177/03635465211064303. 3. A systematic review of 32 studies comparing leukocyte-poor and leukocyte-rich PRP in knee OA found both formulations improved pain and function above the MCID with no significant difference between them at 3, 6 or 12 months - but leukocyte-RICH PRP carried significantly higher odds of post-injection pain (OR 1.64; 95% CI 1.29-2.10) and swelling (OR 1.56; 95% CI 1.22-1.99). Kim JH, et al. — [Adverse Reactions and Clinical Outcomes for Leukocyte-Poor Versus Leukocyte-Rich Platelet-Rich Plasma in Knee Osteoarthritis: A Systematic Review and Meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/34277879/). *Orthopaedic Journal of Sports Medicine*, 2021. DOI: 10.1177/23259671211011948. 4. The BMJ meta-analysis of viscosupplementation pooled 169 trials (21,163 participants) and found clear evidence of small-study effects and publication bias. In the prespecified main analysis of 24 LARGE placebo-controlled trials (8,997 participants) hyaluronic acid reduced pain by SMD -0.08 (95% CI -0.15 to -0.02), equivalent to 2.0 mm on a 100 mm scale - far below the -0.37 minimal important difference - and trial sequential analysis showed there has been CONCLUSIVE evidence of clinical equivalence to placebo since 2009. Fifteen large trials showed a significantly higher risk of serious adverse events (RR 1.49). Pereira TV, et al. — [Viscosupplementation for knee osteoarthritis: systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/36333100/). *BMJ*, 2022. DOI: 10.1136/bmj-2022-069722. 5. FDA's patient and consumer notice on regenerative medicine states that it has received reports of BLINDNESS, TUMOUR FORMATION, neurological events, bacterial infections including life-threatening blood infections, unwanted immune reactions, and cells migrating and forming unintended tissue, following the use of unapproved regenerative medicine products - a list that explicitly includes stromal vascular fraction, amniotic fluid, Wharton's jelly, ortho-biologics and exosomes. It also warns that a product's presence on clinicaltrials.gov, or a firm's registration with FDA, does NOT mean the product is legally marketed. U.S. Food and Drug Administration — [Important Patient and Consumer Information About Regenerative Medicine Therapies](https://www.fda.gov/vaccines-blood-biologics/consumers-biologics/important-patient-and-consumer-information-about-regenerative-medicine-therapies). *FDA (Center for Biologics Evaluation and Research)*, 2021. 6. A 2017 MMWR outbreak report describes 41 cases of septic arthritis following intra-articular injections given during 250 patient visits at a single New Jersey outpatient practice, 30 (73%) of whom needed surgery; recovered organisms were oral flora and the investigation found multiple breaches of infection-prevention practice. Ross K, et al. — [Outbreak of Septic Arthritis Associated with Intra-Articular Injections at an Outpatient Practice - New Jersey, 2017.](https://pubmed.ncbi.nlm.nih.gov/28749922/). *MMWR Morb Mortal Wkly Rep*, 2017. DOI: 10.15585/mmwr.mm6629a3. 7. A Danish register study of all intra-articular procedures performed on Funen over eight years measured the frequency of septic arthritis within 14 days of a glucocorticoid injection as LOW, under a local protocol using a non-touch sterile technique with patients advised to seek care on suspicion of infection. Petersen SK, et al. — [Low frequency of septic arthritis after arthrocentesis and intra-articular glucocorticoid injection.](https://pubmed.ncbi.nlm.nih.gov/31146626/). *Scand J Rheumatol*, 2019. DOI: 10.1080/03009742.2019.1584329. ## What could you ask at a real visit? At QC Kinetix, medical providers are the licensed clinic staff who can review your soreness and goals. Ask about regenerative treatments, the clinic's name for non-surgical blood or marrow procedures. Talk to the clinic team: --- Understand the soreness. Know your next step. Plain answers about sore joints, home relief, warning signs and local care drawn from your blood or pelvic marrow. Plain help for understanding joint soreness, care choices and Mesa travel. For this Mesa injection guide, the site is operated by the owners of the QC Kinetix Phoenix-area clinics. © 2026 Mesa Biologic Safety Desk. Educational information, not personal medical advice.