1.Never ignore minor exacerbations of edema in the upper extremities or chest, and promptly report edema in the upper extremities; 2.Do not draw blood and injections in the affected extremities with poor circulation, and do not perform acupuncture. Avoid measuring blood pressure in the affected limbs with poor circulation, and if bilateral upper limb lymphedema is present, measure blood pressure in the lower limbs; 4. Keep the skin of the affected limbs clean and dry, pay attention to the folds and finger gaps, and rub moisturizer after bathing; 5. Smoking and drinking. Avoid wearing overly tight necklaces, bracelets and rings on the affected limb; 8. Avoid excessive temperature changes when showering or washing dishes, avoid sauna or hot baths, and use sunscreen; 9. Avoid any injury to the affected limb, such as cuts and thorns; 10. Wear gloves when doing housework or planting flowers; 11. Avoid any injury when trimming nails; 12. Avoid excessive fatigue of the affected limb, and rest and elevate the limb when it feels painful. Suggest some exercises, such as walking, swimming, aerobics, aerobics or yoga, Tai Chi; 13. Wear elastic cuffs when flying with lymphedema; 14. Wear light-weight fake breast or suitable bra without steel bra; 15. Use electric razor to remove axillary hair; 16. Wear elastic cuffs during daytime for patients with lymphedema; 17. Have any symptoms of infection, such as rash, cancer itch, The purpose of NLN is to encourage patients to use self-care methods to protect the affected limb, avoid risk factors, prevent infection, and maintain skin integrity. The aim of NLN is to encourage patients to use self-care methods to protect the affected limb, avoid risk factors, prevent infection, and maintain skin integrity.