Premature Ejaculation (PE) is not considered as a disease. Its your cultivated conditioned reflex over a period of time.
Sometimes, if its caused by excessive sensitivity of glans penis, anaesthetic gels/sprays usage help.
Use of SSRI (Selective Serotonin Reuptake Inhibitors) also help.
Simultaneously use of methods like mind diversion, stop n start method, squeeze technique etc are helpful.
Next Steps
consult a Sexologist for it management.
Health Tips
Your determination(will power) and retraining of your ejaculatory system are targets in this.