Do birth marks tell something about the previous birth or reveal any other facts?
Yes they do Garuda Purana - Vol. one - Achar Kanda - Chapter -64,65 are about Samudrika science which gives us detail description of Birthmarks both on males as well as females.
- Chapter 64 - समुद्रिकानुसारेण स्त्री-नर लक्ष णम् ( A brief discourse on the auspicious or inauspicious marks on the person of females.
- Chapter 65 विस्तरत: समुद्रिकानुसारेण स्त्री-नर लक्ष णम् ( auspicious marks on men and women as disclosed by science of Samudrikam.
According to Garuda purana these birth marks are either auspicious or inauspicious. And they do tell us about the personality, the situations a person going to face in the future, financial condition, death (in own or foreign country), about obtaining wealth, about getting good husband or wife, future of sons/daughters, eating habits, royalty, intellect, behavior, personality traits etc.
So these marks are good indicators of a mans of woman's current life.
Here are some of the shlokas from Garuda Purana -:
शङ्खातपत्रशिविकागजपद्मोपमा नृपे ॥
निधीश्वरे ॥ 65.49 ॥
The signs of conch-shell ,umbrella , vehicle ,elephant and lotus
indicate royalty. The marks of pitcher ,goad ,flag and lotus-stalk
indicate the possession of gems.
या च काञ्चनवर्णाभा
सहस्त्राणां तु नारीणां भवेत्सापि पतिव्रता ॥ 64.2
A women whose color is like that of gold ,and and whose hands are red
,is called Padmini .Such a women ,born in a thousand is
personification of chastity.
निः स्वाश्च कुनखैस्तद्वद्विवर्णैः
ताम्रैर्भूपा धनाढ्याश्च अङ्गुष्ठैः सयवैस्तथा ॥ 65.45
Those who have discolored and disfigured nails ,always pry into
others business .Those who have copper colored nails, become kings
the mark of a barley on their thumbs,become rich.
अङ्गुष्ठमूलजैः पुत्री स्याद्दीर्घांगुलिपर्वकः ॥
सुभगश्चैव निर्धनो विरलाङ्गुलिः ॥ 65.46 ॥
When there is such a mark at the foot of the thumb a person gets sons.
If a person has long knots in the fingers he lives a long life and
becomes lucky . He who has dis-joined fingers become poor.
यस्याः पाणितले रेखा प्राकारस्तोरणं भवेत् ॥
अपि दासकुले जाता
राज्ञीत्वमुपगच्छति ॥ 64.9 ॥
The women who ,has the marks of a wall or gateway on her palms becomes
a queen even if she is born as a maid servant.