Hi, Thank you for your query. There is no relationship reported between guttate psoriasis and nose bleeds. Nose bleed can occur due to either a dry nose been picked. I suggest that you get him examined and, in the interim, apply some bland ointment in the nostril. If the bleeding is not controllable then pinch the nose for 5 minutes by the watch. If your son has not passed stools for 5 days then he may require an enema to remove the hard stools and may need laxatives till the stools pass normally. In the meantime you will have to change his dietary habits so that he takes more of green leafy vegetables. You may find the link http://goo.gl/zRm1Q useful for his constipation. I hope I have answered your query to your satisfaction. Wishing your son an early recovery. Regards, Rajiv K Khandelwal http://goo.gl/SuCjl