Hello
I suddenly saw a lump on penis what is painful at touch and looks like wasp sting
Could it be a sting? Are you camping or something?
Unless it gets a lot worse very quickly, you should find it resolves itself in a few days.
If not, get medical help
Where would i get help ftom
If you are in the UK, and don't want to go to your own doctor, all areas have a free NHS service. Type 'sexual health' then your local town into your search box and your nearest one should be listed.
It's hard to offer advice without a pic. This should help you add images:
https://patient.uservoice.com/knowledgebase/articles/402861-how-do-i-add-an-image-to-my-post
If you're using a phone or tablet, you may need to choose the desktop/PC option in your browser.
I'm not sure if it's serious enough to see a doctor, but you could either see your GP, or if you're in the UK, you could go to a genitourinary medicine (GUM) clinic - google "GUM clinic near me" for details.
If you could update this thread and tell us what the doctors say, it would be appreciated. Good luck.