Clinical Research Directory

Inclusion Criteria: 1. all patients with ulcer IH; 2. children with ulcer IH treated with propranolol. Exclusion Criteria: 1\) children with ulcer IH who received other therapeutic interventions were excluded; 2) Children whose families refused to participate in the study; 3) patients with contraindications to oral propranolol, such as allergy to propranolol, severe bradycardia and bronchial asthma; 4) children lost to follow-up during oral propranolol treatment; 5) children unable to oral propranolol or continue to oral propranolol due to other reasons. \-