I have burning sensation beside my lips, cheek, ears and sometimes in my mouth. what could it be?

BMS: Burning mouth syndrome is a chronic orofacial pain disorder that is defined by the international association study of pain as "a burning pain in the tongue or other mucous membranes. The most common chief complaint is a constant burning pain that is frequently experienced in the region of the anterior tongue, especially in women. Rec.: see your dentist or an orofacial pain specialist for consult.

Burning mouth syndro: May be burning mouth syndrome. Talk to your Dentist. Referral to a specialist Oral Pathologist may be in order.