Abstract:Objective To compare the short-term efficacy and safety of foam sclerotherapy (FS) and liquid sclerotherapy (LS) in treatment of degree Ⅰ~Ⅲ internal hemorrhoids.Methods The patients (18~70 years old) with degree Ⅰ~Ⅲ internal hemorrhoids who were continuously treated were selected, and divided into group LS and group FS by random numbers. All the patients need to accepted colonoscopy before surgery. FS and LS of hemorrhoids were injected by the cap-assisted colonic endoscopy. The total amount of polidocanol injection, number of injection points, the bleeding during needle extraction were recorded. The patients were followed up 24 h for perianal pain and 12 weeks after treatment to reevaluate patient’s condition.Results 108 patients aged (52.3 ± 12.6) years were enrolled in this study, of which 59 were male (54.6%), 56 patients were random into the FS group and 52 patients were into the LS group. There were no significant differences in the two groups in any baseline characteristics. In the group FS, 2 cases were invalid, 10 cases were significant effective and 44 cases were cured, the cure effective rate was 78.6%, while in the group LS, the number were 3, 19 and 30, and the significant effective rate was 57.7%. The cure rate of group FS was higher than that of group LS (χ2 = 5.45, P = 0.023). The therapeutic efficacy of internal hemorrhoids with degree Ⅰ and Ⅱ in group FS was significantly better than that in LS group. The total amount of drug stock solution required for treatment in the FS group (2.9 ± 1.4) mL was significantly lower than that in the group LS (6.4 ± 1.7) mL, with a decrease of 54.7%, and the difference was statistically significant (P = 0.000).Conclusion FS in the treatment of degree I~III internal hemorrhoids has high efficacy and safety compared to the LS, meanwhile, it can also reduce the medical expenses, which is suitable for promotion in clinical work.