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Besides the washing Fles mentioned, the other big point of simple hygiene is to keep the area dry. Don't dress until you're dry or the moisture you trap in your clothes could add to the problem.

Also this sounds a lot like the effects of yeast infections (Candidiasis). Yeast infection of the foreskin can cause it to tighten. And intestinal Candidiasis can cause anal itch, irregular bowel movements, etc. The intestinal Candidiasis would encourage the glans/foreskin thrush (yeast) too (because fungal infections tend to encourage other fungal infections). The tiredness (and low blood sugar) are symptoms of intestinal Candidiasis as well.

If you're fighting yeast, avoid milk, cream, milk chocolate and any sweets. Cranberry is pretty good for minor yeast problems too. And cinnamon (in normal amounts) might help restore a good metal/mineral nutritional balance for the best immune system function. (Note, larger amounts of cinnamon are toxic, so don't overdo it.) If these simple home remedies don't help, see a doctor for an evaluation and stronger antifungals (or antibiotics if they're more appropriate). Say that you think it's yeast and he or she may be more understanding, because together these do seem like symptoms of yeast infections.