This Study Aims to Explore the Efficacy of Hyperbaric Oxygen in the Treatment of Flap Ischaemic Necrosis After Breast Cancer Surgery

Inclusion Criteria: 1. understand the study procedure, participate in the study voluntarily and sign the informed consent form 2. aged ≥ 18 years and ≤ 60 years, female 3. ECOG 0-2 4. patients with The SKIN Score Degree of B-D and The SKIN area of 1-3 in the Clavien-Dindo classification after breast cancer surgery； Exclusion Criteria: 1. Contraindications to hyperbaric oxygen therapy: lung disease (severe chronic obstructive airway disease, herpetic lung disease, acute or chronic lung infection, uncontrolled asthma, untreated pneumothorax), history of previous middle ear surgery, middle ear disease (Eustachian tube dysfunction, recurrent episodes of vertigo), eye disease (retinal detachment). 2. Pregnancy or lactation. 3. any other condition that the investigators think the patient is unsuitable for participation in the study