Anti-inflammatory pain, also known as indomethacin, is a non-steroidal anti-inflammatory drug with analgesic, anti-inflammatory and antipyretic properties. Indomethacin inhibits inflammatory reactions mainly through the inhibition of cyclooxygenase, thereby reducing prostaglandin synthesis and inhibiting the formation of inflammatory nociceptive impulses; it can also act on the thermoregulatory center, triggering vasodilation, thereby accelerating heat dissipation, with antipyretic efficacy. Therefore, indomethacin does not treat phlegm, and is mainly applied to inflammatory pain, rheumatism and other diseases. It is contraindicated for those who are allergic to the product and for psychosis, bronchial asthma, epilepsy, pregnant women and children. Use with caution in the elderly, cardiac insufficiency, renal insufficiency and other patients. Adverse reactions are common in headache, vomiting, etc. Pruritus, hyperhidrosis, stomach pain, constipation, fatigue, etc. are less common. Patients with excessive phlegm can use bromhexine, etc. It is suitable for those with thick and sticky phlegm caused by bronchitis, bronchial dilatation, etc., which is not easy to cough out. If the symptoms of phlegm, avoid self-medication, it is recommended to go to the hospital in time, early formal treatment, so as not to cause adverse reactions.