From the analysis of chief complaint, it is caused by bulbar conjunctival vasodilation, mostly caused by chronic inflammatory stimulation.

Suggestion:

Vasodilation caused by chronic inflammatory stimulation will cause foreign body sensation in severe cases, but it will not cause big problems. Don't eat irritating food at ordinary times, pay attention to rest, and the bloodshot will be reduced. If bloodshot has appeared for a long time, it is impossible to completely disappear. If it is considered that foreign body sensation is caused by inflammation, diclofenac eye drops can be used without increasing secretion, and antibiotic eye drops can be used if secretion increases. If you don't get better after taking the medicine, it is recommended to go to the hospital for examination to rule out other eye diseases.