What medicine can I use for anal itching? These medicines are effective

Anal itching is a very common symptom, which has a great impact on patients. It may be caused by pinworm infection, which can be treated with corresponding antibiotics or antibacterial drugs. For those with only local itching and normal anal skin, clean and cold compress the anus with 4% boric acid water. If ice cubes are added, the water temperature should be around 4-5℃ for cold compress.

1. Treat primary diseases or complications such as hemorrhoids, anal fistula, pinworm disease, etc. Give appropriate antibiotics or antibacterial drugs to treat concurrent infections.

2. The drug treatment of localized anal pruritus should be based on local external application. Various drugs used in systemic treatment, such as corticosteroids, anti-inflammatory mediator preparations, various sedatives, etc., have no obvious antipruritic effect on anal pruritus, but they all have many side effects or adverse effects and should be avoided without clear indications.

3. For those with only local itching but normal anal skin, clean and cold compress the anus with 4% boric acid water. If ice cubes are added, the water temperature should be around 4-5℃ for cold compress. The patient can squat and apply cold gauze or cotton wool to the anus to relieve itching immediately. Apply once in the morning and evening every day, each time for about 5 minutes. After the cold compress, wipe the area dry with a dry towel, sprinkle with ordinary talcum powder and keep dry. This type of anal itching is not suitable for external application of ointment, as the ointment hinders heat dissipation and increases sweating, which can easily induce itching. It is advisable to use cool and dry lotions, such as white lotion, calamine lotion, etc.

4. Patients with rough, thickened lichenified lesions on the anal skin often have concurrent infection. Appropriate antibiotics or antibacterial agents can be used. After the infection is controlled, local encapsulation therapy can be performed. After cleaning the local area, disinfect it with alcohol or chlorhexidine solution, and use a syringe to drip the medicine solution of prednisolone injection or triamcinolone injection onto the affected area with an injection needle. Make sure that the affected area is fully immersed in the medicine solution. When the patient feels the itching is relieved, the local medicine solution dries, and then apply ordinary adhesive plaster or ointment containing antipruritic agents according to the size of the lesion. You can also use a film-forming agent or gel containing a drug for film encapsulation. This method should be performed before going to bed. After 6 to 8 hours, remove the plaster or film-forming encapsulation, clean the area, and apply dry lotion or antipruritic aerosol spray. This method is very effective in relieving itching and promoting the regression of lichenification lesions.

5. Injection therapy: Inject the drug subcutaneously or intradermally to destroy the sensory nerves, causing local sensory impairment, disappearance of symptoms, and healing of local injuries. About 50% of cases can be cured permanently. However, those with strict itching are prone to relapse and need to be treated with injections again. The injected drugs not only damage the sensory nerves, but also the motor nerves. Sensory anal incontinence and sphincter dysfunction of varying degrees often occur, but they can recover on their own after a period of time.

(1) Subcutaneous injection of alcohol: Alcohol can dissolve the myelin sheath without damaging the nerve axis, causing the sensory nerve endings to degenerate and the skin to lose sensation until the nerve regenerates. There are two injection methods.

①Zone subcutaneous injection method: Divide the area around the anus into 4 areas and inject one area each time. After skin disinfection, use a long needle to inject 5-10 ml of 1% or 2% procaine solution subcutaneously. Leave the needle in place and then inject 5-10 ml of 95% alcohol. The injected drug should be evenly distributed without outflow or tension. It should not be injected into the skin to prevent skin necrosis; it should not be injected into the anal sphincter to prevent sphincter paralysis. After the injection, apply hot compress and give sedatives for pain relief. After an interval of 5 to 10 days, inject another area and completely inject all 4 areas.

②Multiple subcutaneous injections: After local anesthesia, use an extremely fine needle to puncture multiple sites and inject 3 to 10 ml of 95% alcohol into the subcutaneous tissue around the anus. The distance between each site is 0.5 cm, and 2 to 3 drops are injected at each site. Avoid injecting into the skin or sphincter.