This study aims to verify the efficacy / effectiveness of treatment with transcranial direct therapy (TDCS) in patients with Persistent Covid who present headaches, migraines and chronic pain, such as arthralgias and myalgias. Transcranial Direct Therapy is used in the field of Physiotherapy and Rehabilitation, with results that prove to be effective for the treatment of patients suffering from symptoms such as migraines, headaches, chronic pain, fibromyalgia or chronic neuropathic pain. As can be seen, in the case of patients with Persistent Covid we find several of these symptoms, so it is suggested that, if Transcranial Direct Current Therapy (TDCs) is giving such good results, relieving these symptoms, why can not give such good results and help so much in patients with Persistent Covid, If many of the symptoms are the same, even if the origin or cause is different.