The skin on the inside of the arm is thinner than the rest of the body and has fewer sebaceous glands, making it especially prone to sagging and a wrinkled appearance. This sagging is the result of decades of loss of collagen and elastin in the dermis. No cream or paste can firm up an already degraded structure. The only way to stimulate the production of new collagen is through controlled energy (radiofrequency, ultrasound) or injections of biostimulators, always under the supervision of a professional.
As for the spots, the pigment of senile spots is found in the basal layer of the epidermis, protected by layers of dead cells. To remove a stain, an active ingredient must penetrate to that layer and regulate melanin production. Baking soda, honey, and coconut oil don’t have that ability. Its only function is to remain on the surface.
The real risk of baking soda on the skin
Baking soda has a pH of 8 to 9, much higher than the natural pH of the skin (4.5 to 5.5). Dermatologists warn that its direct application destroys the protective acid barrier, causing dryness, irritation, sensitivity and micro-injuries. In people with medium to dark skin tones, this inflammation can trigger post-inflammatory hyperpigmentation, which manifests as darker and more difficult-to-treat spots than the original ones.
What works (with support and supervision)?
For sagging arms:
Radiofrequency and HIFU: They stimulate collagen in a controlled way. Visible results after several sessions, not days.
Injectable biostimulants (polylactic acid, calcium hydroxyapatite): Increase the thickness and firmness of the skin on the arms. They require a doctor’s prescription.
Strengthening exercises: While they do not tighten the skin, the development of the underlying musculature improves the overall appearance of the arm.
Daily sunscreen: This is the most important measure to stop the damage that continues to degrade collagen.
For senile spots:
Medical treatments: Hydroquinone, tretinoin, or combinations with mild corticosteroids. They take months to disappear.
In-office procedures: Picosecond laser, intense pulsed light (IPL), cryotherapy with liquid nitrogen or chemical peels. They require 2 to 3 sessions and strict subsequent photoprotection.
Over-the-counter products: Products with glycolic acid, niacinamide, or kojic acid may help slightly, but results are slow and modest.
Most important warning:
Before treating any spot on the arm, it should be ruled out that it is skin cancer. Basal cell and squamous cell carcinomas may look like senile spots at first. If a spot grows, changes color, bleeds or itches, it should not be treated with home remedies: you should go to the dermatologist.
