West Ham United midfielder Mark Noble has vowed to return to action as soon as possible.[LNB] The 23-year-old underwent appendix surgery on Monday and is expected to be sidelined for a month.[LNB]News of Noble's absence is a blow, considering the Hammers' current league plight, but he is determined to make a swift recovery.[LNB]He said in The Sun: "I'm fine. I'm glad it's all over and it was painful.[LNB]"But I just want to get back into training as soon as possible and help the team out."[LNB]Meanwhile, Switzerland international Valon Behrami has offered his services in a bid to solve the Hammers' injury woes, with Noble joining Thomas Hitzlsperger on the sidelines.[LNB]Behrami said: "I am feeling good. I have had some bad luck in the last two years with injuries and it seems I have spent a lot of time in this situation.[LNB]"It is normal that my confidence is not so high but I have been working hard and if I keep giving this effort, it will be okay. I am thinking positive.[LNB]"It is not always easy but it is great to be back with the team and ready to play again.[LNB]"It is very important for me to get back to playing. A lot of things have been written and said. The only place I can prove my commitment is on the pitch and I am here for that.[LNB]"West Ham fans are passionate. They are here to see the team getting better and whoever plays, they get behind. If I play and I give 100 per cent, they will be happy. If not, they will let me know and that is right."