• Check your face in a mirror.
• See if the face is asymmetrical, or if there is a prominent lump.
• Open your mouth with or without difficulty.
• Grab your throat (neck) with your fingers and swallow saliva to see if you feel anything different?
• Check the inside of your mouth with a mirror.
• Open upper and lower lips: Examine the oral mucosa and gums for lumps, discoloration (white or red), roughening or ulcers that have not healed for more than two weeks.
• Put out the tongue and swing around to see if the sensation is normal; roll up the tongue to see if there are protrusions, painful lumps, ulcers and other symptoms at the tongue abdomen, edge and bottom of the mouth.
• Open your mouth and make a "ah" sound. Check whether there are any abnormal phenomena such as protrusions, lumps and ulcers in the soft jaw, hard jaw and uvula.

If you have any of the above symptoms, please go to the otolaryngology or oral and maxillofacial surgery as soon as possible! An appetite for a moment will only lead to irreparable regret!