The best way that I found to treat a pimple with no head is to apply a warm compress to it and using a pimple patch.
You can also use ice to reduce inflammation and help the pimple with no head to go away.
To get rid of and treat a pimple with no head using a warm compress, start by applying a warm, wet washcloth to the pimple for 10 minutes and do this several times a day.
The warm wet washcloth applied to the pimple with no head will bring the pimple to a head so that any sebum and dead skin cells as well as bacteria can leave the skin's surface.
You can also use treatments that contain salicylic acid or benzoyl peroxide and use topical creams, lotions, gels, cleansers or serums which contain retinoids.
You can also use antibiotic creams to help get rid of the pimple with no head.
Also using pimple patches which can be either unmedicated or medicated patches can help.
Medicated patches work best for treating and getting rid of a pimple with no head and especially pimple patches that contain benzoyl peroxide which kill off any bad bacteria.
Patches with hydrocolloid also help pull any gunk out of the pimple.
You can also apply some tea tree oil to the pimple with no head as it has anti-inflammatory and antibacterial properties.
And use a non comedogneic moisturizer which helps keep the oil flow balanced.
Avoid popping the pimple or squeezing the pimple as doing so can make the pimple worse.
And if you have pimples with no head also known as blind pimples that occur frequently or if they are really inflamed or painful you should see a dermatologist.