I'm sorry to hear that your oral ulcers are causing discomfort despite using vitamin B complex and lignocaine gel. Oral ulcers on the palate can be painful and sometimes persistent.

Here are some suggestions that might help:

• Maintain oral hygiene: Use a soft-bristled toothbrush and avoid spicy, acidic, or rough-textured foods that can irritate the ulcers.
• Topical treatments: Besides lignocaine gel, you might benefit from topical corticosteroid gels or ointments, which reduce inflammation and pain. These require a prescription from a doctor.
• Pain relief: Over-the-counter pain relievers like paracetamol or ibuprofen can help manage pain.
• Nutritional support: Since vitamin B complex alone hasn't helped, ensure you have a balanced diet including iron, folate, and other vitamins, as deficiencies can contribute to ulcers.
• Avoid irritants: Tobacco, alcohol, and very hot foods can worsen ulcers.
• Hydration: Drink plenty of water to keep your mouth moist.

If ulcers persist beyond two weeks, worsen, or are accompanied by other symptoms like fever or difficulty swallowing, it is important to consult an oral medicine specialist or a dentist. They can evaluate for underlying causes such as infections, autoimmune conditions, or other systemic issues and recommend appropriate treatment.

Please consider seeing a specialist for a thorough examination and tailored treatment plan.To narrow down potential causes, we will need some more information.I understand you have painful mouth ulcers and are seeking treatment advice. Please tell me your age and gender.