Getting a blowjob hurts. How can I reduce the sensitivity of the glans?

Yes, getting sucked hurts for most men who have phimosis or who have just recovered from phimosis. It all depends on the sensitivity of your glans.

Many men with phimosis have an extremely sensitive glans (head). The glans has always been covered inside the foreskin since you were a baby, since the glans had not seen the outside world, it is bound to be sensitive. Additionally, the glans is supposed to be sensitive because it is the glans that is the greatest source of pleasure during sexual intercourse or fellatio in men.

This is common and nothing to worry about. Healing it will take its time and here are the things you can do to treat it:

The basic thing to do here is to expose your glans as much as possible. Expose it to air, water and cloth.

1. Retract your foreskin when showering. Apply warm (not hot) water to your penis and bring the warm water into contact with your glans.
   
   
2. Use the shower head in your bathroom, turn it on and place it on your foreskin so that the stream of water hits the glans. Use pressure according to your comfort.
   
   
3. Use castor oil, apply it on the tip of your glans and try to gently touch the glans. Castor oil is viscous and creates a thick coating on the glans, making it easy to touch with normal hands. Castor oil is also extremely good for stretching and also has antifungal properties.
   
   
4. While you masturbate, expose your glans to the air for longer than usual.
   
   
5. While masturbating, use a lubricant such as castor oil, coconut oil, or any other lubricant and grip the tightest part of your foreskin. While doing the gliding motion, use your thumb (or any finger) and try to touch your glans as you continue to masturbate.
   
   
6. Every time you urinate, retract your foreskin as much as possible and clean the foreskin and glans with water.
   
   
7. 
   Wear phimosis treatment rings according to the size that suits you and continue to put them on for several hours a day. Wear it even when wearing shorts, underwear or pants. Yes, the glans will stick to the inside of your underwear but it is worth retracting the glans from the underwear.

These exercises would help a lot and reduce the sensitivity of your glans over time.