Weird spots on penis

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My penis is not circumcised so every time I go to the shower I have to wash it. However, within the last month I've had pretty bad hygiene. I went to the shower once every 2 or 3 days and sometimes I didn't wash my penis for a week even though I masturbated daily and used my penis for pissing. Now I noticed these weird spots on the penis. Is there any chance that this is an infection? And if so what can I do about it?

If you want to get your situation right, get your penile hygiene in order to start with.
Shower every day - wash your penis after each time you urinate, if you are out of the house and cannot wash, keep clean tissues with you or use toilet tissue to wipe around the tip area of you penis after you have drained all urine from your bladder and urethra.
Before taking a pee draw your foreskin down the shaft of your penis towards your body to keep your foreskin from being contacted with urine.
Cleanliness after producing pre-ejaculate or after ejaculation is an essential: use tissues to dry first, then go wash. The worst thing possible is to ejaculate then just go to sleep with semen on your genitals all night - you risk developing a severe skin condition, and certainly not hygienic.