Striae distensaehttps://en.wikipedia.org/wiki/Stretch_marks
Striae distensae are a form of scarring on the skin with an off-color hue. Over time they may diminish, but will not disappear completely. Striae are caused by tearing of the dermis during periods of rapid growth of the body, such as during puberty or pregnancy, in which they usually form during the last trimester. Usually on the stomach, these striae also commonly occur on the breasts, thighs, hips, lower back, and buttocks. Striae may also be influenced by the hormonal changes associated with puberty, pregnancy, or hormone replacement therapy. There is no evidence that creams used during pregnancy prevent stretch marks.

○ Treatment
It happens when you gain weight too quickly. In this case, losing weight immediately can help prevent symptoms from getting worse.

  • The most common location is around the belly.
  • Striae distensae (stretch marks)
  • Striae distensae (stretch marks)
  • Associated with severe obesity.
References Striae Distensae Treatment Review and Update 31334056 
NIH
Striae distansae (SD) or stretch marks are very common, asymptomatic, skin condition frequently seen among females between 5 to 50 years of ages. It often causes cosmetic morbidity and psychological distress, particularly in women and in certain professions where physical appearances have significant importance. Commonly cited treatments include topical treatments like tretinoin, glycolic acid, ascorbic acid and various lasers including (like) carbon dioxide, Er:YAG, diode, Q-switched Nd:YAG, pulse dye and excimer laser. Other devices like radiofrequency, phototherapy and therapies like platelet rich plasma, chemical peeling, microdermabrasion, needling, carboxytherapy and galvanopuncture have also been used with variable success.
 New Progress in Therapeutic Modalities of Striae Distensae 36213315 
NIH
Topical treatment modalities are mainly used as an adjunctive treatment. Ablative lasers and non-ablative lasers are the most popular, among which picosecond has been tried in striae distensae treatment in the last two years. Combined treatment modalities are currently a hot spot for SD treatment, and microneedle radiofrequency and fractional CO2 laser combined with other treatments are the most common. Microneedle radiofrequency is the most commonly used and achieved therapeutic effect among the combined treatment modalities.