Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern.
There are a number of conditions that could cause small red bumps or spots over penis as follow
Genital herpes is most common. It is sexually transmitted infection & lesions resemble small
pimples or blisters that eventually crust over and finally scab like a small cut. These lesions often appear within the first two weeks the virus is transmitted and can take between two to four weeks to heal.
Your symptoms could indicate a
fungal infection like ringworm. Ringworm causes a red, circular
skin rash inflamed around the edges. Genital warts caused by the human papiloma virus could also be the cause of the bumps.
Syphilis can also cause lesions on the genitals
The best thing to do would be to visit a physician, and he would provide you with a specific diagnosis.
Hope your query is solved
Get well soon