| Lifa disease | FM of rubbing thighs |
| Benign pigmentary problem resulted from frictional injury. | Benign pigmentary problem resulted from frictional injury. |
| Disease of young adult mostly females. | Disease of young adult mostly females. |
| Disease of slim. | Disease of obese. |
| Friction between skin and external agent (lifa). | Friction between two folds of own skin. |
| Pigmentation over bony prominences. | Pigmentation over fleshy parts. |
| Histopathologicaly Fontana stain showed that pigmentation is dermal with possible amyloid deposition. | Histopathologicaly Fontana stain showed that pigmentation could be basilar or dermal without amyloid deposition. |