From your symptoms the possibility of <span style = 'background-color: #dae8f4'>cold</span> <span style = 'background-color: #dae8f4'>sores</span>
due to herpes 1 needs to be ruled out. Pain, burning, tingling, or itching occurs at the infection site before the sores
appear. Then clusters of blisters erupt which break down. You need to get some investigations like sample from the sores
to identify the virus, culture analysis, Tzanck smear, antigen and antibody studies and blood sampling for antibody studies done to confirm the diagnosis.