Bad winter of heavy cold, severe cracked lips, and then strange lump on leg which pushed non painfully to up to my knee and stayed there led to an x ray of that knee and the slight osteoartiritus found, no explanation of the lump. Understand that cycling is good for osteoartiritus but are there anything I should avoid - standing on the pedals going uphill strikes me as one thing I should avoid once I extract the bike from its overlong hibernation assuming the lump is not a problem - have to see doctor again in early May.