It seems like your friend is suffering from folliculitis, which is a bacterial infection of the hair follicles.
It is important to use antibiotic creams and tablets and maintain good local hygiene.
He should also get his blood
sugar tested to rule out
diabetes.
For further details, you can consult me online or visit a certified dermatologist near you.
If your friend stays in Bangalore, he can visit my clinic here (details in my profile)