Is it possible to have arthritis at any age at different severity i think i have mild arthritis because i have knee pain whilst stood or walking not when sat or lying in bed and u get ankle aches not anything specific triggering them they come and go?

Although arthritis is seen more often in older people it is still possible to have it at your age. Arthritis & other rheumatic conditions are a significant cause of work disability. You should be examined by your primary care physician. If you have arthritis you may be referred to a Rheumatologist, who is a doctor that has an expertise in treating arthritis. I wish you well with your health!