Red patches on the thighs without pain or itching may be physiological, such as thighs stimulated by sweat or clothing friction, usually can be relieved by themselves; there may also be allergic purpura or psoriasis and other disease factors, the need to actively treat the primary disease, the symptom can only be relieved, and can be treated with medication.
1. Physiological factors: the thighs are stimulated by sweat or clothing friction, red patches can appear, painless and itchy, this situation usually does not require special treatment, keep the skin clean and hygienic, avoid friction can be relieved on their own.
2. Pathologic factors:
(1) Simple-type allergic purpura: it can be manifested as widespread red patches or spots on the legs, which are painless and itchy. Anti-allergic drugs such as isopropylzine hydrochloride, chlorpheniramine, loratadine, etc., as well as vascular permeability-reducing drugs such as vitamin C, rutin tablets, etc., can also be used to help alleviate the symptoms.
(2) Ordinary type psoriasis: it can be manifested as red patches on the skin of legs, covered with silvery-white scales, and the patients can have no self-conscious symptoms. Mometasone furoate cream or fluticasone propionate cream can be used to smear the affected area, but also can be combined with the alternating use of capotriol ointment to increase the efficacy.
Patients with red plaques on the thighs are not painful or itchy, if physiological factors are excluded, it is recommended to consult a doctor to identify the cause and treat it.