Which herbs can be used externally to regulate premature ejaculation

The role of purely external treatment of premature ejaculation of traditional Chinese medicine is not very satisfactory, more should be based on oral treatment of traditional Chinese medicine, can treat premature ejaculation of traditional Chinese medicine are Cornus officinalis, cuttlebone and sequestration.
1. Cornus officinalis has the effect of tonifying the liver and kidney, astringent and astringent (astringent consolidation). It is often used in treating dizziness and tinnitus, soreness and pain in the waist and knees, impotence and spermatorrhea, frequent urination, disintegration (excessive menstrual flow or dribbling) with menorrhagia, profuse sweating, and internal heat and thirst (internal fever accompanied by symptoms of overeating, excessive drinking, and excessive urination), etc. It is also used in treating premature ejaculation. Contraindications, precautions and adverse reactions are not clear.
2. Cuttlebone has the efficacy of fixing semen and shrinking urine (consolidating semen and urine, preventing random leakage), tonifying the kidney and helping yang. It is often used in spermatorrhea, dyspareunia, dysuria, dyspareunia (cloudy urine like white pulp). Contraindications, precautions and adverse reactions are not clear.
3. Sequence has the effect of tonifying the liver and kidney, strengthening the tendons and bones, stopping bleeding and stabilizing the fetus, treating injuries and renewing folds, and can be used for the treatment of impotence, spermatorrhea and urination, lumbar and knee pain, rheumatism and paralysis, tendon fracture, leakage, fetal leakage (small amount of bleeding from the vagina in the early stage of pregnancy), bruises and injuries, and other conditions. Contraindications, precautions and adverse reactions are not known.
Before using Chinese medicine, it is necessary to ask a doctor for identification and use it under the doctor’s guidance, so as to avoid improper use of medicine and delay of the condition.