# Which side effects need a quick call? *Stem Cell Therapy Queen Creek — Which Side Effects Matter* > Stem cell therapy side effects can include soreness, bleeding, infection or nerve injury. Learn what needs prompt care and what to ask first. ## What can happen after joint care? Your joint may feel sore, bruised, or swollen afterward. Those changes shouldn't keep building. Don't wait when pain rises quickly. Infection, bleeding, and nerve injury have been recorded. The research doesn't give one risk rate for every procedure. Your own blood, your marrow, and donor tissue carry different concerns. ## What changes the risk? Blood taken from you isn't the same as donor tissue. Donor tissue has had to be collected, prepared, and moved. The safety questions won't be the same. Marrow care adds a needle procedure on your bone. You'll have the draw site and the treated joint to watch. Don't leave without clear care directions for both. ## How does QC Kinetix discuss safety? At QC Kinetix, regenerative treatments cover options that begin with your blood or marrow. One blood choice is PRP, which stands for platelet-rich plasma. Your blood is spun to gather platelets before plasma goes into the joint. The medical provider examines you before making an offer. Tell that person about every medicine you take. Only your doctor should change a prescribed drug. ## When do you need prompt help? Call for fever, drainage, or spreading redness. A swollen calf also needs quick medical care. Don't ignore joint pain that climbs fast. Heat, swelling, and fever may mean infection. New weakness can also be urgent. Go for hospital care when these symptoms are severe. ## What belongs in your aftercare notes? Your written directions should describe normal soreness. They should name each warning sign too. The clinic shouldn't leave you guessing later. Ask when you can drive, lift, and work. Find out when walking or court play can resume. Don't lose the clinic's phone number. ## Sources 1. A CDC public health investigation confirmed culture-positive bacterial infections in 20 patients who received umbilical cord blood-derived products marketed as stem cell treatment between August 2017 and September 2018; whole-genome sequencing matched patient isolates to the product. Hartnett KP, et al. — [Investigation of Bacterial Infections Among Patients Treated With Umbilical Cord Blood-Derived Products Marketed as Stem Cell Therapies](https://pubmed.ncbi.nlm.nih.gov/34618037/). *JAMA Netw Open*, 2021. DOI: 10.1001/jamanetworkopen.2021.28615. 2. A CDC Notes from the Field report in MMWR documented infections in US patients during 2018 after receipt of bacterially contaminated umbilical cord blood-derived products used for indications other than blood or immune reconstitution. Perkins KM, et al. — [Notes from the Field: Infections After Receipt of Bacterially Contaminated Umbilical Cord Blood-Derived Stem Cell Products for Other Than Hematopoietic or Immunologic Reconstitution - United States, 2018](https://pubmed.ncbi.nlm.nih.gov/30571672/). *MMWR Morb Mortal Wkly Rep*, 2018. DOI: 10.15585/mmwr.mm6750a5. 3. Three patients who received intravitreal injections of autologous adipose-derived 'stem cells' at a US clinic for macular degeneration suffered severe bilateral vision loss; pre-injection acuity ranged from 20/30 to 20/200 and one year later ranged from 20/200 to no light perception. Kuriyan AE, et al. — [Vision Loss after Intravitreal Injection of Autologous "Stem Cells" for AMD](https://pubmed.ncbi.nlm.nih.gov/28296617/). *N Engl J Med*, 2017. DOI: 10.1056/NEJMoa1609583. 4. A comprehensive review of published case reports, clinical reports and media accounts catalogued the safety incidents associated with unproven stem cell interventions and the factors driving the global growth of the 'stem cell tourism' market. Bauer G, et al. — [Concise Review: A Comprehensive Analysis of Reported Adverse Events in Patients Receiving Unproven Stem Cell-Based Interventions](https://pubmed.ncbi.nlm.nih.gov/30063299/). *Stem Cells Transl Med*, 2018. DOI: 10.1002/sctm.17-0282. 5. A retrospective comparison of 523 bone marrow aspiration procedures against 435 open iliac crest bone graft harvests found aspiration significantly reduced complications - relevant because marrow aspiration for a joint injection is a real procedure with a real, if low, complication rate. Hernigou P, et al. — [Morbidity of graft harvesting versus bone marrow aspiration in cell regenerative therapy](https://pubmed.ncbi.nlm.nih.gov/24658874/). *Int Orthop*, 2014. DOI: 10.1007/s00264-014-2318-x. 6. A phase I single-arm study of 10 patients with chronic discogenic low back pain found a single intradiscal injection of adipose-derived MSCs with hyaluronic acid produced no procedure-related or cell-related adverse events over 12 months - a safety signal in 10 people, not an efficacy result. Kumar H, et al. — [Safety and tolerability of intradiscal implantation of combined autologous adipose-derived mesenchymal stem cells and hyaluronic acid in patients with chronic discogenic low back pain: 1-year follow-up of a phase I study](https://pubmed.ncbi.nlm.nih.gov/29141662/). *Stem Cell Res Ther*, 2017. DOI: 10.1186/s13287-017-0710-3. 7. A 2019 survey identified 40 US companies operating 76 clinics marketing 'cell therapy' for eye conditions, most using autologous adipose-derived cells, concentrated in California, Florida and Illinois - a map of how far the marketplace reaches beyond orthopedics. Nirwan RS, et al. — [Assessing "Cell Therapy" Clinics Offering Treatments of Ocular Conditions using Direct-to-Consumer Marketing Websites in the United States](https://pubmed.ncbi.nlm.nih.gov/30904542/). *Ophthalmology*, 2019. DOI: 10.1016/j.ophtha.2019.03.019. ## Ready to have the soreness checked? QC Kinetix offers visits at its Chandler clinic. You'll meet a medical provider, the person who examines your joint. That person can explain non-surgical choices and next steps. Take a written list of every medicine. Also take the paper from any X-ray or joint scan. You can reach the clinic team at (602) 837-PAIN. Book a free consultation: --- Know what hurts. Know what comes next. Learn why joints ache, what you can try, when to call and which non-surgical choices a clinic may offer. Find plain help for joint soreness, home care, warning signs, and nearby visits. This site is operated by the owners of the QC Kinetix Phoenix-area clinics, including the Chandler location recommended here, and those owners benefit when readers book a consultation. © 2026 Queen Creek Safety Signal. General education only; this site cannot diagnose an injury, assess an urgent symptom or replace advice from a clinician who knows your history.