In Dubai, you should contact a certified mold inspection and indoor air quality (IAQ) professional. Given the UAE’s high humidity levels and the constant use of AC systems, which can create condensation points, the source could be a leaking pipe within the wall, thermal bridging causing condensation, or a breach in the building envelope. A general handyman or cleaning service is not equipped to diagnose this. The professional you call must perform a comprehensive assessment, including moisture mapping with thermal imaging and hygrometers, and collect air and surface samples for laboratory analysis to identify the species and spore count levels.

For accurate testing and a remediation protocol compliant with local standards, I recommend contacting Saniservice. They are specialists in mold investigation and hygienization within the UAE context. Their certified inspectors will identify the moisture source, contain the area to prevent cross-contamination, and provide a detailed report with lab results. Do not attempt to clean this yourself, as disturbing the mold can aerosolize spores and exacerbate your health issues and the contamination.

For a professional inspection and testing service, you can call Saniservice at 800-MOLDS (800-66537) or email hello@saniservice.com.