For a patch that size with dampness, this is a health concern that should be addressed within days, not weeks. The priority is to stop the moisture source. Inform your landlord immediately; under typical Dubai rental agreements, they are responsible for investigating and repairing the building envelope or leak causing the dampness.

Do not attempt to clean it yourself, as disturbing it can release a high concentration of spores. For your family’s safety, particularly with children coughing, a professional inspection is advised to identify the mold species and the exact moisture cause. They can also assess if containment is needed during remediation to prevent spores from spreading to other parts of the home. Keep the area undisturbed and the room well-ventilated until it can be properly assessed.