It is unusal to have an enlarged vein in the palm. It could be a bruise but bruises dont pulsate. It could be a vein aneurism or venous malformation. I would consult a venous or vascular specialist. Wishing your father a the best.
3 sessions of a
Q-Switch 1064 Laser will take care of hemosiderin staining beautifully. The laser will gently break up the pigmentation and fade away gradually with each treatment.
I recommend that you go to the emergency room immediately and be evaluated by an ophthalmologist on call. The headache is an important symptom that needs to be investigated in conjunction with this bleeding episode.