Persistent pain and itching after herpes zoster may indicate post-herpetic neuralgia, which requires specific pain relief medicines such as pregabalin or gabapentin. You should consult a doctor or neurologist promptly to manage the pain and adjust treatment. Please do not continue or change medication on your own.

For a skin infection causing itching and rashes, maintain good hygiene, keep the affected area clean and dry, and avoid scratching to prevent worsening. A doctor may prescribe an antifungal or antibiotic cream depending on the cause. Seek medical attention promptly if the rash spreads, becomes painful, or is accompanied by fever or discharge.

You should take antiviral medicines such as valacyclovir or aciclovir, as prescribed by your doctor, to treat herpes on your back and stomach. Antihistamines such as cetirizine and soothing lotions such as calamine can help relieve itching, and medicines for nerve pain, such as pregabalin or gabapentin, may be added if required.

You should see your doctor or an eye specialist immediately, as herpes zoster affecting the eyes may cause serious complications. Early treatment with antiviral medications, such as acyclovir or valacyclovir, is essential to prevent the rash from spreading and protect your vision. Keep the affected skin clean and dry, and avoid touching or scratching it to reduce the risk of secondary infections.

To treat herpes zoster (shingles) scars on your forehead, several topical options can help. Daily use of silicone gel is highly effective for softening and flattening raised scars. For dark spots or discoloration, topical creams containing ingredients like vitamin C, kojic acid, or niacinamide can gently brighten the skin. To improve texture and fade scars, a generic topical retinoid, such as tretinoin, can be beneficial by promoting skin cell turnover. Always keep the area moisturized and protected with broad-spectrum sunscreen, as UV rays can worsen scarring. Please consult a dermatologist to find the safest and most effective regimen for your skin.

No, you cannot get chickenpox after having shingles, as both are caused by the same virus already present in your body. Your lingering pain is likely postherpetic neuralgia, which can be managed with medications like gabapentin, pregabalin, or acetaminophen. \n\nHowever, your new symptoms of high fever, headache, and painful black marks (which could indicate a secondary bacterial infection) are concerning and not typical three weeks after shingles. You should not self-medicate for these new symptoms. Please see a doctor immediately for an urgent evaluation to rule out complications like secondary infections or meningitis.