All articles tagged with #scratching
Researchers show that TRPV4 channels in touch‑sensitive neurons participate in a negative feedback signal telling the brain scratching has provided enough relief, effectively acting as a neural “stop scratching” switch. In mice engineered to lack TRPV4 in sensory neurons, scratching episodes were fewer but lasted longer, implying that targeted neuronal pathways—not blanket TRPV4 blockade—could be key for treating chronic itch.
Scratching itchy skin can worsen the problem; instead, gently rubbing or stroking the area with fingers or a soft brush can soothe the itch more effectively, backed by science.
The iPhone 17 Pro is more resistant to scratches overall, thanks to its anodized aluminum shell, but the camera area remains vulnerable due to a sharp, raised edge that scratches easily, especially on darker finishes. Users are advised to use a case to protect the camera from scratches, while other parts of the phone are more durable against minor scratches from everyday items.
Two new iPhone 17 Pro and iPhone Air colors appear to scratch more easily than previous models, raising concerns about their durability and finish quality.
The cycle of itching and scratching can be difficult to break due to the evolutionary reflex developed to expel unwanted visitors on the skin. Scratching provides temporary relief by inflicting a little pain, which inhibits the sensation of itching. However, scratching further damages the skin and activates nerve fibers, intensifying the itch-scratch cycle. The neurotransmitter serotonin plays a role in this cycle, inhibiting pain but also activating itch neurons. Scratching also activates the brain's reward system, providing pleasure. While there are treatments available, efforts are being made to develop therapeutics that target neural pathways involved in itching. In the meantime, refraining from scratching can be challenging, but alternative methods like cold compresses or intense heat can help interrupt the sensation.