Last Updated: 'Unique Symptom': Post-COVID Patients Experiencing Cognitive Dulling Or Mental Slowing The second wave of COVID-19 has taken a major toll on the mental health of the patients who suffered from the infection & also on their families, said Dr Gupta PIXABAY/UNSPLASH After recovering from Coronavirus, patients are experiencing cognitive dulling or slowing mental activity as unique post-COVID symptoms, said mental health experts. Dr Manushree Gupta, Associate Professor, Department of Psychiatry, Vardhaman Mahavir Medical College (VMMC) and Safdarjung Hospital stated that patients tend to feel dejected and fatigued and the exact mechanism is not clear. "Post-Covid patients are also exhibiting a unique symptom of cognitive dulling or mental slowing where they are experience slowing of mental activity, inability to think clearly and feeling dejected or fatigued for 2-3 months after recovery from Covid infection. However, the exact mechanism is not clearly understood but is believed to result from the alterations in blood clotting mechanisms in the brain or even direct inflammation of the brain tissue, " said Dr Gupta.