 [ Symptoms ] i have had a recurring bump on the shaft of my penis for a little over a year its red but doesnt hurt what could it be the bump does not burn sting or hurt in any way it seems to be around where some pubic hair is i have had sexual contact before with my now ex girlfriend and am wondering if it is an std i have given blood not because of the bump but because i wanted to and got my results back they gave me a card that had my blood type and name they gave my a paper for future donations and thats it i have also found sores in my mouth but i have stabbed myself with a toothbrush before and had sores after [ Disease ] there is the testicle itself which should be like a firm but not hard egg sized almost thing the epididymis where the sperms mature and develop the ability to fertilize the egg feels more like an earthworm attached to the bag and there can be little tiny cysts and nodules that come off of that and lumps and bumps so it is essential that when you do a testicular self exam that you get used to understanding what you are like it is like women with a breast self exam you learn the lumps and bumps the guy down there needs to know what is normal so if there is a change they can say aha this lump was not there last month men are supposed to do testicular self exams they should be doing an exam ideally once a month best in the shower when they are soapy and wet and that will tell them what their normal baseline is but our biggest problem in urology is that men are diagnosed with testicular cancers late they do not find them early when it is a little lump or bump they wait until it is large