My knees ached for a long time. I did not realize that I got bow knees. I thought bow knees is so visible that they are curvy. Mine were not like that. After the x-ray, the doctor told me that this was bow knees. It was the cause of the pain. After study many data and got more confidence when I learnt about the result of MHTO operation of many cases of Dr. Somsak patients. I decided to have the MHTO operation of both legs immediately. Now I am so glad that my knees are not ache anymore and I still have my own knees, not the artificial ones.