甲醛对人体的危害主要通过以下几个作用产生：
The harm of formaldehyde to human body is mainly caused by the following effects:
产生作用
Make a difference
表现症状
Symptoms
刺激作用
Stimulation
甲醛是原浆毒物质，能与蛋白质结合、高浓度吸入时出现呼吸道严重的刺激和水肿、眼刺激、头痛。
Formaldehyde is a toxic substance in plasma, which can combine with protein. When inhaled in high concentration, it will cause severe irritation and edema of respiratory tract, eye irritation and headache.
致敏作用
Sensitization
皮肤直接接触甲醛可引起过敏性皮炎、色斑、坏死，吸入高浓度甲醛时可诱发支气管哮喘。
Direct contact with formaldehyde can cause allergic dermatitis, pigmentation and necrosis. Inhalation of high concentration formaldehyde can induce bronchial asthma.
致突变作用
Mutagenicity
高浓度甲醛还是一种基因毒性物质。实验动物在实验室高浓度吸入的情况下，可引起鼻咽肿瘤。
High concentration formaldehyde is also a genotoxic substance. Experimental animals in the laboratory of high concentration inhalation, can cause nasopharyngeal tumor.
甲醛超标会使得人体出现头痛、头晕、乏力、恶心、呕吐、胸闷、眼痛、嗓子痛、胃纳差、心悸、失眠、体重减轻、记忆力减退以及植物铜钟 一次性止血带 标志桩模具 钢丝轮 流水槽模具 防撞墙模具 检查井钢模具 不锈钢铸件 模锻件神经紊乱等症状；孕妇长期吸入可能导致胎儿畸形，甚至死亡，男子长期吸入可导致男子精子畸形、死亡等。
Excessive formaldehyde can cause headache, dizziness, fatigue, nausea, vomiting, chest tightness, eye pain, sore throat, poor appetite, palpitation, insomnia, weight loss, memory loss and autonomic nerve disorder; Long term inhalation may lead to fetal malformation or even death in pregnant women. Long term inhalation in men may lead to sperm malformation and death in men.