What is anti-TNF alfa therapy?

I am a 36 years old man. What is anti-TNF alfa therapy?

 

TNF stands for Tumour Necrosis Factor. Any agent that counters TNF is called anti-TNF. These drugs are used in many auto-immune disorders such as rheumatoid arthritis, ankylosing spondylitis, psoriasis, Crohn's disease, asthma etc.