how come theres loads of young ones on here when they say i

A relief at last the cancer wasn’t in the rest of my nodes that they removed,was doing really well with my excercises etc and returned to the surgeon who noticed i’d got an infection in my wound,after several days my scar split open and it had to be drained by my nurse at the doctors,for some reason also im now having loasds of trouble lifting my arm up and have a large lump near where the drain hole was,i seem to of gone backwards as far as my arm is concerned,am starting chemo next thursday i think for 6 lots of fec as far as i understand