Red grains under the tongue can be divided into several possibilities: 1, normal granulation tissue under the tongue; 2, tongue papilloma under the tongue, this situation is generally selected for surgical removal and timely pathological examination, usually pay attention to maintain oral hygiene, in order to avoid the recurrence of papilloma phenomenon; 3, red grains under the tongue, there may be sublingual gland stones resulting in redness, swelling and pain under the tongue; 4, red grains under the tongue, there may be condyloma acuminata, or a history of bad sex may also be AIDS. The red grains under the tongue may also be condyloma acuminata, or a history of bad sex may also be AIDS, it is recommended to go to the stomatology department for examination in a timely manner, the symptoms of which should be given antiviral treatment in a timely manner, and appropriate isolation.