###Human: Why am having red lesion in multiple areas of mouth with pain? ###Assistant: Hello. Such multiple lesions usually can occur either in vitamin deficiency or even herpes simplex and a few other conditions. In your case, it appears that you need Multivitamin capsules. Take a Multivitamin capsule with Vitamin B complex once daily for 15 days. Since how many days, have you started seeing these lesions? Use warm salt water gargle twice a day for a week or two. Start taking a balanced diet with a lot of veggies and some meat and egg products. Avoid snacks and spicy food too. Can you explain your typical weekly diet?