It is very common for little ones to experience frequent, foul-smelling stools after taking antibiotics and metronidazole (Metrogyl). These medications can temporarily disrupt the healthy bacteria in your son's gut, leading to antibiotic-associated diarrhea or temporary difficulty digesting milk sugars (lactose). Since this has lasted for three weeks, his gut lining likely needs some time to heal. Please ensure he stays well-hydrated. I highly recommend consulting his pediatrician, who can evaluate if a probiotic, stool test, or temporary dietary change is needed to help his gentle tummy recover.

Moving teeth when you have lost half of their supporting bone can cause them to loosen or fall out, so "fast" or DIY aligners are not safe. Your use of Metrogyl DG gel (metronidazole/chlorhexidine) shows you are actively managing gum issues, which is excellent. Right now, the most important step is to work with a periodontist (gum specialist) to stop further bone loss and stabilize your gums. Once your bone health is completely stable, they can discuss safe, gentle cosmetic options with you.

It is very common to experience a sore throat after a root canal. This discomfort is often caused by keeping your mouth open for an extended period, minor irritation from dental instruments, or the local anesthetic injection. While Ketorol DT (ketorolac) helps with pain and Metrogyl (metronidazole) fights infection, the localized tissue swelling in your throat may take a few days to fully heal. To help soothe your throat, try warm salt water rinses, stay well-hydrated, and eat soft, cool foods. Please contact your dentist if the pain worsens, or if you develop a fever or severe difficulty swallowing.

It is safe to give him paracetamol to help ease his toothache, but please make sure to use the correct pediatric dose based on his weight. However, Metrogyl (metronidazole) is an antibiotic and should only be given if specifically prescribed by his doctor or dentist. Antibiotics will not relieve pain directly and are only for active infections. Since he has a history of cavities, the best step is to have a dentist examine him promptly to find the root cause of his pain and safely treat it.

While there is no permanent cure for rosacea, it is highly manageable. Your routine with Cetaphil face wash, Cetaphil DAM, and metronidazole (Metrogyl) is a great foundation. The new itching you are experiencing could be a sign of skin dryness or mild irritation. To manage the redness and itching, try using lukewarm water to wash your face, avoid rubbing, and ensure your skin is thoroughly moisturized. Since itching is a new symptom, I recommend consulting your dermatologist. They can evaluate if your metronidazole dose needs adjustment or if a different soothing treatment is required.

Seeing a worm in your stool, along with your symptoms, strongly suggests a parasitic infection like pinworms, which antibiotics like Metrogyl or Ciplox TZ do not cure. Frequent use of these medications can also disrupt your gut health. Please don't worry, as these infections are very treatable. I highly recommend consulting a doctor for a stool test to identify the exact parasite so they can prescribe the correct deworming medication.